US3585860A - Sampling valve for high temperature corrosive gases - Google Patents
Sampling valve for high temperature corrosive gases Download PDFInfo
- Publication number
- US3585860A US3585860A US797848A US3585860DA US3585860A US 3585860 A US3585860 A US 3585860A US 797848 A US797848 A US 797848A US 3585860D A US3585860D A US 3585860DA US 3585860 A US3585860 A US 3585860A
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- United States
- Prior art keywords
- valve
- valve body
- stems
- channel
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
- G01N30/20—Injection using a sampling valve
Definitions
- This invention relates to a plural valve system arranged to mix intermittent samples of a first gas with a constant flow of second gas and deliver the mixture to a location external to said valve system.
- this invention relates to a sampling valve for high temperature process gases which are corrosive at these temperatures, the valve having an improved, corrosion resistant construction for intermittently injecting into a continuously flowing stream of inert carrier gas a predetermined volume of sampled process gas.
- Gas chromatography essentially is a process for separating complex mixtures of gas into their components. In order to accomplish the separation, a so-called partitioning or separating column is used. In gas chromatography, an inert sweep or carrier gas (such as helium or nitrogen) flows continuously through the separating column. This is the main fluid stream, usually having a flow rate of between 50 and 100 cc./minute. A small sample of a mixture to be analyzed (called the sample) isinjected into the sweep or carrier gas stream, prior to the column. The chromatogram may be developed by elution, the different components of the sample having different retention times in the separating column.
- inert sweep or carrier gas such as helium or nitrogen
- valves In the design of fluid-sampling valves, it is desired to achieve certain ends among which are a valve having a quick, smooth operation so that the uniform flow of the carrier gas through the partitioning column is disturbed as little as possible.
- the valve should be as small and compact as possible so that it can be used where space is limited.
- the parts of the valve should be long wearing, to reduce to a minimum the cost and inconvenience of making repairs.
- the force required for operating the valve should be small.
- process gases having one or more of the following present in at least minor concentration at temperatures of 225 C. or greater: chlorine, fluorine, hydrogen chloride, hydrogen fluoride, sulfur dioxide, nitric oxide, nitrous oxide and hydrogen sulfide.
- Valves which have TEFLON surfaces contacting the process gas have not been able to perform at temperatures in excess of 225 C. in such corrosive, gaseous atmospheres for any length of time with reliability.
- This invention makes possible the sampling of corrosive process gases at temperatures in excess of 222 C. where none of the gaseous components will condense from the sample and the combination of these samples of process gas with a constant flow of carrier gas to a chromatograph or other analytical instrument.
- An associated object of this invention is to have a high temperature, corrosion-resistant valve capable of drawing intermittent samples of process gas for long periods of operation with minimal repairs so that periods of at least a year of operation without repairs are possible.
- a further object of this invention is to have a valve construction with the foregoing features while having the smooth, quick action features and small, compact size of existing prior art devices.
- a further object of this invention is to have a valve capable of mixing intermittent volumes of a gas with an uninterrupted flow of another gas, thus achieving a mixture of the two gases.
- FIG. 1 is a section through a sampling valve which receives a continuous flow of carrier gas and intermittent samples of high temperature, corrosive, gaseous atmospheres, the valve being constructed in accordance with the teaching of this invention.
- the figure illustrates a point in the sampling sequence when the lower set of valve stems are not in contact with the valve body 10.
- FIG 2 is a partial view of FIG. 1 showing the valve body with valve stems, packing and housing partially cut away at a different point in the sampling sequence when the upper set of valve stems are not in contact with the valve body 10.
- FIG. 3 is a partial view showing the valve body with the valve stems, packing and housing partially cut away and all the valve stems are in contact with the valve body. This is the normal rest position of the valve stems prior to and after a sampling sequence.
- FIG. 4 sets forth the sampling valve as integrated into an operating system whereby associated hardware provides energy pulses to operate the sampling valve system for taking samples to be combined with a sweep to pass to an analytical instrument.
- a valve body 10 whose outer configuration is substantially that of a rectangular prism, has therein, as positioned in the drawing, which position is not critical to the operation of the valve, two passageways which extend through the valve body in a generally horizontal direction, one passageway carrying a constant flow of a gas such as an inert, carrier gas and the other passage receiving an intermittent flow of another gas such as a process gas.
- the flow pattern of the first gas (carrier gas) is from a source CG through line 31 to valve body 10 where the line 31 is connected in an airtight seal to the threaded portion 15 of chamber 11.
- Chamber 11 connects to cavity 13 which in turn is connected to chamber 8.
- the gas flows from cavity 13 into chamber 8 which joins another cavity 14 which connects to chamber 6.
- Chamber 6 has a threaded portion 15a enabling line 33 to be connected thereto in an airtight connection with line 33 leading to an external location 34 such as a chromatograph.
- the flow pattern of the second gas comes from a conduit 32 or reservoir into line 30 to valve body 10 where line 30 is connected in an airtight seal to the threaded portion 15b of chamber 12.
- Chamber 12 empties into cavity which in turn is connected with chamber 28'.
- the gas flows in chamber 28', empties into chamber (sample port) 26 which is connected to chamber 29.
- the process gas flows from chamber 29 into cavity which isjoined to channel 7.
- Channel 7 has a threaded portion 15c enabling an airtight connection with line 35 which enables the process gas to flow into the atmosphere, to pollution control equipment or to conduit means 32 downstream from line 30 (when a venturi, for example, is located downstream in conduit means 32).
- Intersecting the passageways are two chambers or bores which extend through the valve body or block 10, and as shown in FIG. l, are positioned in a vertical direction.
- the bores have a constricted or small diameter central portion (channels 28 and 28 and channels 29 and 29) which serves to interconnect the two gas passageways.
- the bores are counterbored to provide larger diameter portions, the first larger diameter portions being 13, 13a, 14 and 14a, the next larger diameter portions being 13' and 14, and the largest diameter portions being 13" and 14" which open on the edges of the valve body 10.
- Channels 28 and 29 serve to interconnect the passageway carrying a constant flow of a gas with the passageway receiving an intermittent flow of another gas.
- valve stems l6, l6a, 16b and Me there are four valve stems in all
- the valve stems 16, 16a, 16b and 160 of cylindrical shape are slideably moveable and capable of being placed so as to fit tight against the valve body 10 or can be withdrawn from valve body 10.
- the tip of the valve stems 16, 16a, 16b and 160 are of such size that when brought against the valve body 10 at channels 28, 29, 28' and 29', respectively, no gas will pass from channel lll into channel 28, from channel 29 into channel 6, from channel 12 into channel 28' or from channel 29 into channel 7.
- valve stems 16 and 16a have passageways 9 and 9, respectively, therethrough which enables gas from channel llll to pass through stem 16 into channel 8 on the left side of the valve body 10 and from channel 8 into channel 6 on the right side of the valve body 10.
- Each valve stem can have a rounded rim on the outside of the stem at the junction of the conical tips and the cylindrical stems to better seal with the sleeves.
- the upper two sleeves 17 and 17a have openings 4 and 5, respectively, which enable gas to pass from the passageway 9 in valve stem 16 into channel 8 on the upper left side of the valve body and from channel 8 to passageway 9' in valve stem 16 on the upper right side of the valve body.
- Resting on the sleeve 17 and enclosing a small portion of each valve stem are a series of packing rings 19 and resting on the packing rings is a packing follower 20.
- each sleeve 17, packing rings 19 and packing follower 20 is a hollow cylindrical housing (valve bonnet) 18, the housings being threaded externally on the end fitting the threading of bores 13" and M with the other end of each housing 18 being sealed off by a gland nut 21 which is threaded to fit the internally threaded end of the housing 18 which opens away from the valve body.
- the two valve stems to and 160 on the upper side of the valve body form one pair of valve stems called, for purposes of reference in this discussion, the upper pair of valve stems, with those on the lower side of the valve body forming another pair of valve stems (16b and 160) called the lower pair of valve stems.
- the upper pair of valve stems, l6 and 16a is connected to an upper crossbar 22 and the lower pair of valve stems, 16b and 16c, is connected to a lower crossbar 24, with one form of connection being by crossbar nuts 23, as shown in the drawing, but other forms of fastening, such as by welding, could also be practiced.
- the upper crossbar 22 is in turn connected to a drive shaft 25 which receives energy inputs to slideably operate the upper set of valve stems l6 and 16a from a closed position where the tips of the stems l6-and 16a are in contact with the valve body 10 to an open position where the tips of the valve stems 16 and 1611 do not contact the valve body 10.
- the lower crossbar 24 is connected to a drive shaft 27 which receives energy inputs to slideably operate the lower set of valve stems 16b and 160 from an open position where the tips of the valve stems 16b and Me do not contact the valve body 10 to a closed position where the tips of the valve stems 16b and Me are in contact with the valve body 10 and restrict the passage of fluid.
- each set of the valve stems slideably moves through a small space by sliding as crossbars 22 and 24 receive energy inputs.
- each set of stems mates with the valve body 10, but when withdrawn, the stems leave a path for a fluid to flow.
- the valve stems act as a simple flow or no flow sequence for the passageways with regard to the flow of fluid through the valve body.
- the upper set of valve stems 16 and 16a have passageways 9 and 9' bored therein so that the carrier gas passes through these passageways 9 and 9 in stems 16 and 16a when the stems are seated on valve body 10.
- FIGS. ll, 2 and 3 A discussion of the operation of the sampling valve will be given by reference to FIGS. ll, 2 and 3, the discussion being adapted for sampling a process gas for analysis by an analytical instrument.
- the upper set of valve stems 16 and 16a are positioned tight upon the valve body 10 sealing off channels 28 and 29 from channels 11 and 6, respectively, so that the carri' er gas cannot enter channels 28 and 29 as shown in FIG. 3.
- a sweep of carrier gas is established from a source CG into conduit means 31 through the valve body 10 entering channel 11, passing through cavity 13, through passageway 9 in stem 16 and through passageway 4 in sleeve 17, reaching channel 8.
- valve stems 16b and 16 are positioned tight upon the valve body 10 sealing off channels 28' and 29' from channels 12 and 7, respectively, as shown in FIG. 3. Further, valve 37 is turned to open position to enable gas to flow in line 30.
- an inert gas comes from channel 40 into cavity i3 through channel 12 and line 30 reaching a porous, metallic plate in the line at point 36 which opens into conduit 32.
- the back purging is optional but is desirable where solid matter may temporarily plug up the porous, metallic plate used in withdrawing the process gas from conduit 32.
- the lower set of valve stems 16b and 16c are positioned away from the valve body 10 so that the process gas will freely flow into channel 12 in valve body 10 from line 30 (See FIG. 1). Then the process gas passes into cavity up channel 28 into sample port (channel) 26, down channel 29 into cavity Ma. From cavity 1410 the gas enters channel 7 and passes out of the valve body 10 into line 35.
- line 35 can return downstream to the main process gas stream in large conduit means 32, exit into the atmosphere or a pollution control unit as desired.
- the process gas is allowed to flow for a short time so that the process gas in channel 26 of valve body 10 is representative of that currently in the process gas stream, then energy is applied to the lower drive shaft 27 which moves the shaft 27, the associated lower crossbar 24 and the lower set of connected valve stems 16b and 16c into contact with the valve body at channels 28' and 29 of valve body 10 (typically one-eighth inch to one-fourth inch in movement).
- the upper set of valve stems is returned to contact with the valve body 10 so that the sweep again passes from passageway 11 into cavity 13, through passageway 9 of stem 16 and passageway 4 of sleeve 17 into channel 8, from channel 8 the gas passes through passageway 5 of sleeve 17a and passageway 9 of stem 16a into channel 6, out channel 6 into line 33 to analytical instrument 34.
- the lower set of valve stems 16b and 160 are left in contact with the valve body 10 until the next flow of the process gas into channel 12 of valve body 10. This position of the valve is shown in FIG. 3. At this point, the sampling cycle is complete. In summary by reference to the figures, the sampling cycle is as follows: It starts with FIG.
- valve body 10 has the bottom set of valve stems withdrawn from the valve body as shown in FIG. 1 to let the process gas flow in and then the set is placed against the valve body to trap a sample in the sample port. Then the upper set of valve stems is withdrawn from the valve body 10 as shown in FIG. 2 until the carrier gas has flushed the process gas in channel 26 to the instrument 34 and then all stems are returned to contact with the valve body 10 as shown in FIG. 3.
- the valve body 10 (or a lining for the channels 12, 28, 28, 26, 29,29, 6 and 7 and cavities 13a and 14a of the valve body 10 coming into contact with the process gas) and the tips of the valve stems 16, 16a, 16b and 16c (or a lining for the tips) are usually fabricated of high temperature, corrosion-resistant materials, preferably nickel or the I'IASTELLOY A and B series of nickel-containing alloys, but the high quality stainless steel 316 series, INCONEL and MONEL have also proven satisfactory.
- the sleeves 17 (17a) surrounding each valve stem are usually pressed graphite or carbon, but other materials will work, such as available high temperature, self-lubricating compositions.
- the other parts of the valve can be made of lower cost, conventional materials, as these parts do not come into contact with the high temperature, corrosive, process gas.
- the valve bonnet, gland nuts, crossbars, crossbar nuts and drive shaft can be made of conventional metallic alloys, such as steel, aluminum, etc.
- the packing rings and followers are typically made of carbon or pressed graphite.
- the conduit means coming in contact with the process gas e.g., 30, 33, 35
- Those conduit means not contacting the process gas e.g., 31
- FIG. 4 a typical system for operating the sampling valve for sampling the corrosive gases at very high temperatures as described in this invention is given in FIG. 4.
- 40 represents either manually operated electrical pulsing means for operating solenoid valve 42 or a timer for operating solenoid valve 42 at a predetermined time sequence through electrical energy transmitted on wires 41.
- a source of air 44 travels in line 43 which splits into three lines, 46, 47 and 48 at point 45.
- the solenoid valve 42 When the solenoid valve 42 is energized, this valve starts air motor 50 with air in line 49, which drives gear box 51 by means 52, one example of which is a belt drive.
- Gear box 51 turns shaft 53 and the attached cams 54 55, 56 and 57 thereon with these cams being designed to operate four different three-way valves, 58, 59, 60 and 61 in a sequence given below.
- the three-way valve 58 keeps the air motor 50 running through a complete cycle (usually about 60 seconds) by allowing the air in line 47 to drive the air motor 50.
- the three-way valve 59 opens diaphragm valve 64 to back purge sample line 30 and the porous plate at 36 for about 20 seconds and then closes.
- a suitable purge gas such as for example nitrogen, is supplied from a source not shown, through line 66.
- the three-way air valve 60 applies air under diaphragm 70 which pulls the connected set of stems 16b and 16c away from valve body 10 to allow the process gas to flow through sample port 26 for a period of 30 seconds, and then lets the set of stems 16b and seat upon valve body 10 trapping a sample of process gas in the sample port 26.
- cam 57 operates the three-way valve 61 which allows air from line 71 to operate air-to-open valve 73.
- drive shaft 25 is pulled away from valve body 10 which in turn moves crossbar 22 and the associated set of valve stems 16 and 16a so that the tips of the valve stems no longer seal off the channels 28 and 29 (in FIG. 1) in the valve body, but now the carbon sleeves l7 and 17a seal off the passageways 9 and 9' in the valve stems l6 and 16a.
- valve operation described i.e., the operation from position where both sets of valve stems are in contact with the valve body as in FIG. 3 to the FIG. 1 position through FIG. 2 position and returning to a position where both sets of valve stems are in contact with the valve body as in FIG. 3
- the valve operation described takes place very rapidly, so that the time during which all four valve stems are not in contact with the valve body is only a very small fraction of time.
- the interruption of the flow of sweep gas is only slight and not noticed by the analytical instrument 34.
- the valve shown in FIGS. 1 through 3 may be enclosed in an insulated box and heated so that the valve body and components are maintained at a desired elevated temperature during sampling.
- the sampling valve of this invention is rather simple to manufacture; the only critical machining operations are those for the surfaces involved for channels 11, 8, 6, 7, 26 and 12, the bores 2828', 29-29, 13, 13a, 13', 13'', 14, 14a, 14' and 14" and the tip of the valve stems 16.
- Channels 8 and 26 are drilled into the valve body 10 from one side with welding or solid screws being used to fill the extra area cut away from the side of the block to the beginning of channels 8 and 26.
- the air pressure required to operate the valve is very small.
- the stems in practice are only moved a fraction of an inch (typically one-eighth inch to one-fourth inch), preferably ssinch maximum, when being removed from contact with the valve body or being brought into contact with the valve body.
- channels ill, 12, ti and 7 may be drilled at a right angle to channels til and 26 instead of in a line as shown in FIGS. 11 through 3.
- the valve of this invention is very small in size.
- the dimensions from the outer face of the upper gland nut 2K to. the outer face of the lower gland nut 21 may be 13 inches fl inches; the overall width of the valve body may be 2% inches :1 inch with a depth dimension for the valve body of 2 /4 inches :1 inch.
- the gas conducting passageways l1, 8, 6, 7, 26 and 12 through the valve body of this invention are made small, as analytical instruments can give very accurate readings on a small volume of sample.
- the size of sample port 26 can be readily varied by using different size drills where larger volume is desired. As a result of the gas conducting paths being so small, any necessary dead space is kept to a very small volume, when compared to the sample volume.
- valve model has successfully sampled process gas from a vapor phase reaction of isophthalonitrile and chlorine for six months without failure.
- the valve body is made of nickel and the bottom one-half inch of all the valve stems are made of nickel with the packing being a pressed carbon.
- the temperatures of the process gas brought into the valve range from 300 to 400 C.
- the process gases analyzed have included the following constituents: chlorine, hydrogen chloride and tetrachloroisophthalonitrile. Examination of the valve parts, when disassembled, has revealed a minimum of corrosion; in fact, the valve was still judged capable of operation for at least a similar period of time before any further replacement of components would be needed.
- An on-stream sampling valve for delivering a controlled volume of sample gas to be analyzed, and a continuous flow of a second inert carrier gas, through a delivery line to an analytical instrument, comprising a valve body, having in combination;
- At least two entry lines and at least two exit lines suitably attached thereto at least a first said entry line being connected to a continuous source of inert carrier gas, and at least a second said entry line being connected to a source of sample gas to be analyzed; at least a first said exit line being connected to said analytical instrument, and at least a second exit line being connected to a suitable means for recycling or disposing of excess sample gas;
- valve body B. a chamber means disposed within said valve body, said chamber having a predetermined volume equal to the controlled volume of sample gas to be delivered to said analytical instrument;
- valve stem assemblies each comprising a valve bonnet means fixedly mounted in said valve body, and having disposed therein a valve sleeve, a valve stem and packing means, said packing means being disposed to surround said valve stem and act as a gastight seal with respect thereto,
- valve stems being slidably positioned within said valve sleeves and suitably adapted to be simultaneously moved by a first drive means, whereby they can be simultaneously moved to an engaged or to a disengaged position
- said first pair of valve stem assemblies being so positioned within said valve body that when in said engaged position one of said valve stems will engage said first valve seat and create a gastight seal between said chamber means and said first channel means, and the second valve stem will engage said second valve seat and create a similar gastight seal between said chamber and said second channel means, while when in said disengaged position, said valve stems will be so disposed as to permit free flow of sample gas from said second entry line through said first channel means into said chamber and out of said chamber through said second channel means to said second exit line;
- G a fourth channel means connecting said first exit line to said chamber through a fourth valve seat means;
- valve stem assemblies each comprising a valve bonnet means fixedly mounted in said valve body and having disposed therein the valve sleeve, valve stem and packing means, said packing means being disposed to surround said valve stem and act as a gastight seal with respect thereto,
- valve stems being slidably positioned within said valve bonnet, and suitably adapted to be simultaneously moved by second drive means, whereby they can be simultaneously moved to an engaged or to a disengaged position;
- a series of passageways comprising at least a first passageway through one of said valve stems connecting at one end to said third channel means, a second passageway through the other said valve stem connecting at one end to said fourth channel means, and at least a passageway through said valve sleeves and said valve body connecting said first and second passageways;
- said second pair of valve stem assemblies being so positioned within said valve body that a. when in said engaged position one of said valve stems will engage said third valve seat and create a gastight seal between said chamber and said third channel means, the other valve stem will engage said fourth valve seat means and create a similar gastight seal between said chamber and said fourth channel means, and said series of passageways will be so aligned as to permit the passage of carrier gas from said first entry line through the third channel means, the series of passageways, and the fourth channel means to said first exit line;
- valve stems when in said disengaged position said valve stems will be so disposed as to permit free flow of carrier gas from said first entry line through said third channel means into said chamber, out of said chamber to said fourth channel means, through said fourth channel means to said first exit line, said first passageway and said second passageway having been moved out of alignment with the third passageway;
- sample gas will pass from the second entry line to the first channel means into said chamber, and thence from said chamber through said second channel means to said second exit line;
Abstract
Description
Claims (4)
- 2. The sampling valve of claim 1 wherein said chamber and each of said channel means and said passageways are lined with a high-temperature material selected from the group consisting of nickel, the HASTELLOY series, the stainless steel 316 series, INCONEL AND MONEL.
- 3. The sampling valve of claim 7 wherein the tips of the valve stems are lined with a high-temperature material selected from the group consisting of nickEl, the HASTELLOY series, the stainless steel 316 series, INCONEL AND MONEL.
- 4. The sampling valve of claim 6 wherein the valve body is a high-temperature material selected from the group consisting of nickel, the HASTELLOY series, the stainless steel 3l6 series, INCONEL and MONEL.
- 5. The sampling valve of claim 4 wherein the tips of the valve stems are lined with a high-temperature material selected from the group consisting of nickel, the HASTELLOY series, the stainless steel 316 series, INCONEL and MONEL.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US79784869A | 1969-02-10 | 1969-02-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3585860A true US3585860A (en) | 1971-06-22 |
Family
ID=25171952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US797848A Expired - Lifetime US3585860A (en) | 1969-02-10 | 1969-02-10 | Sampling valve for high temperature corrosive gases |
Country Status (5)
Country | Link |
---|---|
US (1) | US3585860A (en) |
JP (1) | JPS498975B1 (en) |
DE (1) | DE2005841A1 (en) |
FR (1) | FR2035201A5 (en) |
GB (1) | GB1298635A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160146765A1 (en) * | 2009-12-07 | 2016-05-26 | S.T.I. Security Technology Integration Ltd. | Method and apparatus for inspecting a gas sample |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4922671U (en) * | 1972-05-29 | 1974-02-26 | ||
US4333500A (en) * | 1980-05-23 | 1982-06-08 | Phillips Petroleum Company | Fluid actuated valve |
GB2148265B (en) * | 1983-10-18 | 1987-09-30 | Standard Telephones Cables Ltd | Corrosion inhibitor for vehicle cooling system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1532781A (en) * | 1923-06-29 | 1925-04-07 | Schneider & Cie | Stopcock and shut-off cock for pressure-fluid piping |
US3021713A (en) * | 1959-07-27 | 1962-02-20 | Sun Oil Co | Fluid sampling valve |
US3166939A (en) * | 1961-09-25 | 1965-01-26 | Pan American Petroleum Corp | Sample valve |
US3186234A (en) * | 1961-09-12 | 1965-06-01 | Beckman Instruments Inc | Sampling valve |
US3205701A (en) * | 1961-11-07 | 1965-09-14 | Leeds & Northrup Co | Fluid analyzing systems |
-
1969
- 1969-02-10 US US797848A patent/US3585860A/en not_active Expired - Lifetime
-
1970
- 1970-02-09 GB GB6144/70A patent/GB1298635A/en not_active Expired
- 1970-02-09 FR FR7004420A patent/FR2035201A5/fr not_active Expired
- 1970-02-09 DE DE19702005841 patent/DE2005841A1/en active Pending
- 1970-02-10 JP JP45011403A patent/JPS498975B1/ja active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1532781A (en) * | 1923-06-29 | 1925-04-07 | Schneider & Cie | Stopcock and shut-off cock for pressure-fluid piping |
US3021713A (en) * | 1959-07-27 | 1962-02-20 | Sun Oil Co | Fluid sampling valve |
US3186234A (en) * | 1961-09-12 | 1965-06-01 | Beckman Instruments Inc | Sampling valve |
US3166939A (en) * | 1961-09-25 | 1965-01-26 | Pan American Petroleum Corp | Sample valve |
US3205701A (en) * | 1961-11-07 | 1965-09-14 | Leeds & Northrup Co | Fluid analyzing systems |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160146765A1 (en) * | 2009-12-07 | 2016-05-26 | S.T.I. Security Technology Integration Ltd. | Method and apparatus for inspecting a gas sample |
US9612228B2 (en) | 2009-12-07 | 2017-04-04 | S.T.I. Security Technology Integration Ltd. | Method and apparatus for inspecting a gas sample |
US10393708B2 (en) | 2009-12-07 | 2019-08-27 | S.T.I. Security Technology Integration Ltd. | Method and apparatus for inspecting a gas sample |
Also Published As
Publication number | Publication date |
---|---|
JPS498975B1 (en) | 1974-03-01 |
DE2005841A1 (en) | 1970-08-20 |
GB1298635A (en) | 1972-12-06 |
FR2035201A5 (en) | 1970-12-18 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: SDS BIOTECH CORPORATION, A DE CORP. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DIAMOND SHAMROCK CORPORATION;REEL/FRAME:004159/0701 Effective date: 19830714 |
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AS | Assignment |
Owner name: NATIONAL AUSTRALIA BANK LIMITED, 200 PARK AVE., NE Free format text: SECURITY INTEREST;ASSIGNOR:FERMENTA PLANT PROTECTION COMPANY, A CORP. OF DE;REEL/FRAME:004734/0198 Effective date: 19870624 |
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Owner name: FERMENTA PLANT PROTECTION COMPANY,OHIO Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANCOMERICA COMMERCIAL CORPORATION;REEL/FRAME:004764/0408 Effective date: 19870630 Owner name: FERMENTA PLANT PROTECTION COMPANY, 7528 AUBURN ROA Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANCOMERICA COMMERCIAL CORPORATION;REEL/FRAME:004764/0408 Effective date: 19870630 |
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Owner name: NATIONAL AUSTRALIA BANK LIMITED, A BANKING CORP. O Free format text: AMENDMENT TO SECURITY INTERST RECORDED ON REEL 4734 FRAME 198;ASSIGNOR:FERMENTA PLANT PROTECTION COMPANY;REEL/FRAME:004940/0284 Effective date: 19880301 Owner name: NATIONAL AUSTRALIA BANK LIMITED, 200 PARK AVENUE, Free format text: AMENDMENT TO SECURITY INTERST RECORDED ON REEL 4734 FRAME 198;ASSIGNOR:FERMENTA PLANT PROTECTION COMPANY;REEL/FRAME:004940/0284 Effective date: 19880301 Owner name: MTRUST CORP, NATIONAL ASSOCIATION,TEXAS Free format text: SECURITY INTEREST;ASSIGNOR:FERMENTA PLANT PROTECTION COMPANY;REEL/FRAME:004881/0087 Effective date: 19880301 Owner name: NATIONAL AUSTRALIA BANK LIMITED, A BANKING CORP. O Free format text: SECURITY INTEREST;ASSIGNOR:FERMENTA PLANT PROTECTION COMPANY;REEL/FRAME:004881/0087 Effective date: 19880301 Owner name: MTRUST CORP, NATIONAL ASSOCIATION, P.O. BOX 2629, Free format text: SECURITY INTEREST;ASSIGNOR:FERMENTA PLANT PROTECTION COMPANY;REEL/FRAME:004881/0087 Effective date: 19880301 Owner name: NATIONAL AUSTRALIA BANK LIMITED, 200 PARK AVENUE, Free format text: SECURITY INTEREST;ASSIGNOR:FERMENTA PLANT PROTECTION COMPANY;REEL/FRAME:004881/0087 Effective date: 19880301 |
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Owner name: BANK ONE, TEXAS, NATIONAL ASSOCIATION Free format text: SECURITY INTEREST;ASSIGNOR:NATIONAL AUSTRALIA BANK LIMITED, A CORP. OF AUSTALIA;REEL/FRAME:005614/0875 Effective date: 19910109 |
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Owner name: ISK BIOTECH CORPORATION, OHIO Free format text: RELEASE BY SECURED PARTY;ASSIGNORS:BANK ONE, TEXAS, NATIONAL ASSOCIATION, A NATIONAL BANKING ASSOCIATION, AS AGENT FOR ITSELF;FIRST NATIONAL BANK OF CHICAGO, THE, A NATIONAL BANKING ASSOCIATION;HARRIS TRUST AND SAVINGS BANK, AN ILLINOIS STATE BANKING CORPORATION;REEL/FRAME:006579/0796 Effective date: 19930603 |