WO1999044034A1 - System for the in-line extraction and dilution of a representative sample of a processed medium - Google Patents
System for the in-line extraction and dilution of a representative sample of a processed medium Download PDFInfo
- Publication number
- WO1999044034A1 WO1999044034A1 PCT/US1999/003832 US9903832W WO9944034A1 WO 1999044034 A1 WO1999044034 A1 WO 1999044034A1 US 9903832 W US9903832 W US 9903832W WO 9944034 A1 WO9944034 A1 WO 9944034A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- process stream
- diluent
- emitter
- measurement instrument
- diluted
- Prior art date
Links
- 238000000605 extraction Methods 0.000 title claims abstract description 12
- 238000010790 dilution Methods 0.000 title claims description 11
- 239000012895 dilution Substances 0.000 title claims description 11
- 238000000034 method Methods 0.000 claims abstract description 60
- 239000003085 diluting agent Substances 0.000 claims abstract description 57
- 238000005259 measurement Methods 0.000 claims abstract description 54
- 230000008569 process Effects 0.000 claims abstract description 54
- 239000002245 particle Substances 0.000 claims abstract description 39
- 238000004458 analytical method Methods 0.000 claims abstract description 22
- 230000003134 recirculating effect Effects 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 5
- 230000005465 channeling Effects 0.000 claims 1
- 239000000523 sample Substances 0.000 description 45
- 239000002609 medium Substances 0.000 description 40
- 238000005070 sampling Methods 0.000 description 15
- 238000009826 distribution Methods 0.000 description 12
- 230000003750 conditioning effect Effects 0.000 description 11
- 230000001143 conditioned effect Effects 0.000 description 10
- 238000000149 argon plasma sintering Methods 0.000 description 4
- 239000012470 diluted sample Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000002296 dynamic light scattering Methods 0.000 description 3
- 239000012468 concentrated sample Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012897 dilution medium Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012625 in-situ measurement Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007415 particle size distribution analysis Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
Definitions
- This invention relates generally to the field of particle size distribution analysis and more particularly to a system for the in-line extraction, dilution and conveyance of a representative sample of a processed medium for examination by a particle size distribution measurement instrument.
- Particle size distribution is an important parameter in many processes and its accurate measurement is required for the precise and cost-effective control of the process.
- the measurement of particle size distribution in order to accurately control a process finds importance in industries that manufacture cement, cosmetics, pharmaceuticals and the like.
- a number of instruments are presently used in industry that use angular light scattering or dynamic light scattering techniques to measure particle size distribution in a liquid medium. These instruments analyze and measure the concentration of particles suspended in the liquid medium and provide a measurement that is used to adjust the process in order to correct for any irregularities in the final processed product.
- One such angular light scattering measurement instrument is taught in U.S. Patent No. 5,416,580, to Trainer et al, issued May 16, 1995.
- an extracted sample representative of the processed medium must be conditioned for measurement. Conditioning disperses the particles within the suspension into a concentration value that is within the concentration requirements of the measurement technique being utilized.
- concentration of particles within a typical process is generally higher than is allowed by the measurement technique being utilized and the aforementioned conditioning introduces some form of dilution to disperse the concentration.
- multiple scattering limits the -2- concentration to less than 0.1% of particles in suspension.
- particle-to-particle interactions limit concentration to less than 3%.
- Particle concentrations in a processed medium can be as high as 50% by volume.
- a system for the extraction and delivery of a diluted representative sample of a processed medium, flowing as a process stream within a conduit or pipe, for the analysis by a particle measurement instrument includes a shroud tube located within the conduit, longitudinally aligned with the process stream and arranged to receive and allow a portion of the process stream to flow therethrough.
- a diluent delivery arrangement includes an emitter that is located in the shroud tube.
- the emitter is arranged to release a stream of diluent into the process stream flowing in the shroud tube.
- the diluent released by the emitter mixes with the processed medium within the shroud tube, forming a stream of diluted processed medium that flows downstream of the emitter.
- a sample recirculation arrangement is connected to the particle measurement instrument and includes a collector located in the shroud tube downstream from the emitter and a drain located in the conduit downstream of the collector.
- the collector is arranged to capture representative samples of the diluted processed medium flowing past the collector and responsive to the process stream flowing in the shroud tube the representative samples captured are conveyed on a continual basis to the particle measurement instrument for analysis.
- the representative samples displaced by the newly arriving samples are conveyed to the drain and returned to the process stream flowing in the conduit.
- the diluent delivery arrangement further includes a flow control device connected to the emitter and to a source of diluent.
- the flow control device is arranged to be manipulated to connect the source of diluent to the emitter and to control the amount of diluent released by the emitter into the shroud tube.
- This flow control device can either be manually manipulated to adjust the flow of diluent to the emitter or adjusted by a controller operatively connected to the flow control device.
- the controller is arranged to receive output signals from the measurement instrument representing the dilution concentration of the representative sample under analysis. Responsive to the output signals received from the measurement instrument, the controller develops and applies a controlling output to the flow control device.
- the controlling output can be effected by a mechanical linkage between the controller and the flow control device or an electrical output signal.
- the electrical output signal would be applied to an electrically-driven servo actuator or pneumatically-driven actuator that adjusts the flow control device and, therefore, the flow of diluent delivered by the emitter.
- FIGURE 1 is a schematic block diagram of the system of the present invention for the in-line extraction, dilution and conveyance of a representative sample of a processed medium for examination by a particle size distribution measurement instrument;
- FIGURE 2 is a schematic block diagram of the system of FIGURE 1 including provisions for automating the dilution of the representative sample extracted from the processed medium.
- FIGURE 1 there is shown a system for the in-line extraction, dilution and conveyance of a representative sample of a processed medium in accordance to the present invention.
- the system is comprised of a diluent delivery arrangement 15 and a sample recirculating arrangement 18.
- the diluent delivery arrangement 15 includes a diluent delivery conduit 10 having an emitter 11 connected on one end and to a flow control device 60 on an opposite end.
- Flow control device 60 is connected via conduit 61 to a source of diluent or dilution medium stored in a storage device 62.
- the sample recirculation arrangement includes a sample delivery conduit 20 connected to a collector 21 on one end and to a sampling cell 100 of a measurement instrument 110 on an opposite end.
- a sample return conduit 30 connects sampling cell 100 to drain 31.
- the system of the present invention is contemplated to be used to extract representative samples of a processed medium flowing in a process stream within a pipe or conduit 40.
- Pipe 40 can either be a main conduit that transports the processed medium during a process operation or a by-pass line that shunts a portion of the processed medium from the main conduit.
- the processed medium flows within pipe 40 as a process stream in the direction shown by flow arrows F3.
- a shroud tube 50 is located within pipe 40 in longitudinal -5- alignment with the process stream. Shroud tube 50 receives and channels a portion of the process stream flowing through pipe 40 through a first open end 51 and out of shroud tube 50 via a second open end 52.
- Conduit 10 and emitter 11 forms a pitot-like device that is located substantially within shroud tube 50 in proximity to open end 51.
- Emitter 11 further includes an opening 12 that faces in the direction of the process stream flowing in shroud tube 50.
- conduit 20 and collector 21 of the sample recirculating system form a pitot-like device that is located substantially within shroud tube 50 proximate shroud tube second end 52.
- Collector 21 further includes an opening 22. However, opening 22 faces against the direction of the process stream flowing within shroud tube 50.
- emitter 11 is located within shroud tube 50 upstream, and spaced a distance from, collector 21 which is located in shroud tube 50 at second location downstream of emitter 11. The space within shroud tube 50 between emitter 11 and collector 21 forms mixing region 25.
- opening 12 of emitter 11 faces and is in direct horizontal alignment with opening 22 of collector 21.
- Tube 30 and drain 31 of the sample recirculating arrangement forms a pitot-like device that is located within pipe 40 downstream of shroud tube opening 52.
- Drain 31 further includes an opening 32 that faces in the direction of the process stream flowing in pipe 40.
- Sample delivery conduit 20 and sample return conduit 30 each have their opposite ends 27, 37 respectively, terminating at a sampling cell 100 of a measurement instrument 110.
- Measurement instrument 110 is a device of the type commonly used in particle size distribution measurement and analysis and that employs angular light scattering or dynamic light scattering techniques to measure particle size distribution. In such instruments a conditioned sample representing the processed medium is deposited in sampling cell 100, whereby the measurement instrument performs the measurement and analysis on the conditioned sample contained in the sampling cell.
- Diluent delivery conduit 10 has an opposite end 17 terminating at the flow control device 60.
- Flow control device 60 can be a manually adjustable valve, petcock or other such device that can open, close or regulate the flow of diluent flowing through device 60.
- dilution medium is stored in the diluent storage device 62 and is conveyed to flow control device 60 via conduit 61.
- a processed medium flowing in a process stream through pipe 40 in the direction shown by arrows F3 enters opening 51 of shroud tube 50, where it enters opening 22 of collector 21.
- the pressure force exerted by flow F3 drives a continuous stream of processed medium into opening 22 of collector 21.
- the processed medium travels through sample delivery conduit 20 in the direction shown by flow arrow F2, thereby filing sampling cell 100.
- This continuous stream flowing within conduit 20 replaces the processed medium previously delivered to sampling cell 100.
- the processed medium forced out of sampling cell 100 by the newly arriving processed medium is returned to pipe 40 in the direction shown by flow arrow F2' via sample return conduit 30 to drain 31.
- the returned processed medium exits drain 31 from opening 32 and rejoins the main body of the process stream as shown by flow arrow F4.
- the arrangement just described illustrates a means of conveying on a continual, real-time basis a concentrated sample of the processed medium to the measurement instrument 110 for analysis.
- the representative sample must be conditioned. Conditioning introduces some form of dilutant or clear suspending medium fluid to disperse the concentration. The dilution is accomplished by the introduction of a diluent medium to the processed medium before it is driven to the sampling cell 100.
- Opening flow control device 60 allows the introduction of diluent from storage device 62 via conduit 61, to flow control device 60.
- the diluent flows through flow control device 60 in the direction of flow arrow Fl into diluent delivery conduit 10.
- the diluent is carried by conduit 10 to emitter 11, where it exits from opening 12.
- Any convenient method for extracting the diluent from storage device 61 can be employed, including, but not limited to, motor driven pumps or gravity feed.
- the process stream flowing in the shroud tube 50 and the diluent medium exiting opening 12 are combined and mixed at mixing region 25, thereby forming a conditioned or diluted representative sample of the processed medium.
- This conditioned sample is driven by the process stream flowing in -7- shroud tube 50 downstream of emitter 11 toward collector 21. Opening 21 receives the now diluted representative sample, whereby it is conveyed to sampling cell 100 in the manner explained above in the operation of the sample recirculating arrangement.
- the diluted representative samples are continually conveyed to sampling cell 100, whereby a newly arriving diluted sample displaces a previously deposited diluted sample.
- the displaced diluted sample exits sampling cell 100 at 37 and is driven through sample extraction conduit 30, where it exits from opening 32 of drain 31 and back into pipe 40 downstream of shroud tube 50.
- the sample delivered to sampling cell 100 With a zero flow rate of diluent the sample delivered to sampling cell 100 will be at full concentration. Inversely, with a high rate of diluent flow, greater than the flow of processed medium flowing through shroud tube 50, only diluent will enter opening 22 and the particle concentration of the representative sample reaching sampling cell 100 will be zero. Therefore, by adjusting the flow Fl of diluent through device 60, the concentration of the representative sample delivered to the sampling cell 100 can be controlled. A proper concentration of particles to diluent is required for an accurate measurement by measurement instrument 110. By reading the measure of loading or attenuation from the measurement instrument 110, the flow control device 60 can be manipulated manually to control the flow of diluent. This manual manipulation of the concentration, however, requires the constant attention of the measurement device output by an operator and the manual adjustment of the flow control device 60.
- FIGURE 2 the arrangement illustrated in FIGURE 1 is shown including a means for automating the control of diluent to emitter 11.
- the introduction of diluent into the diluent delivery arrangement taught and shown by FIGURE 1 can be effectively automated by connecting the signals representing the loading or attenuation of measurement instrument 100 to a controller device 200.
- the controller device receives the signals output by the measurement instrument 100, interprets the signals received and develops a controlling output 201 to flow control device 60.
- the controlling output 201 can be effected by a mechanical linkage between controller 201 and flow control device 60 or an electrical output signal.
- the electrical output signal would be applied to an electrically-driven servo actuator or pneumatically-driven actuator (not shown), that adjusts the opening of flow control device 60 and, therefore, the flow Fl delivered by emitter 11.
- an electrically-driven servo actuator or pneumatically-driven actuator (not shown), that adjusts the opening of flow control device 60 and, therefore, the flow Fl delivered by emitter 11.
- the arrangement of the present invention will continuously provide a correct conditioned sample to measurement instrument 110 irrespective of the size or concentration of the particles in the processed medium or the flow pressure or rate of flow of the process stream.
- the arrangement of the present invention provides a sample delivery system that requires no mechanical pumping, seals, gate valves or reticulating systems and, therefore, requires a minimal effort to operate and to maintain.
- the present invention delivers to the measurement instrument 110 a conditioned sample representative of the particles present in a processed medium on a continual basis for a real-time, in-situ measurement analysis without the time limitations imposed by the prior art systems.
- the conditioning and delivery system of the present invention provides an effective and simple system that can be used with any number of particle size distribution measurement instruments to effect the precise and cost-effective control of a processed medium.
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99936115A EP1058828A1 (en) | 1998-02-25 | 1999-02-23 | System for the in-line extraction and dilution of a representative sample of a processed medium |
JP2000533734A JP2002529683A (en) | 1998-02-25 | 1999-02-23 | Series extraction and dilution system for representative samples of processed media |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/030,463 US6020960A (en) | 1998-02-25 | 1998-02-25 | System for the in-line extraction and dilution of a representative sample of a processed medium |
US09/030,463 | 1998-02-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999044034A1 true WO1999044034A1 (en) | 1999-09-02 |
Family
ID=21854314
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1999/003832 WO1999044034A1 (en) | 1998-02-25 | 1999-02-23 | System for the in-line extraction and dilution of a representative sample of a processed medium |
Country Status (4)
Country | Link |
---|---|
US (1) | US6020960A (en) |
EP (1) | EP1058828A1 (en) |
JP (1) | JP2002529683A (en) |
WO (1) | WO1999044034A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024013650A1 (en) * | 2022-07-15 | 2024-01-18 | Agilent Technologies, Inc. | A sample delivery system for an analytical instrument |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7088801B1 (en) * | 1997-09-08 | 2006-08-08 | Mci, Inc. | Single telephone number access to multiple communications services |
DE10301421A1 (en) * | 2003-01-16 | 2004-07-29 | Bayer Ag | Process analysis systems with automatic liquid sample preparation and connection to process control systems |
BR112015001320A2 (en) * | 2012-07-23 | 2017-07-04 | Halliburton Energy Services Inc | method for analyzing a multiphase fluid |
JP6717086B2 (en) * | 2016-07-06 | 2020-07-01 | 住友金属鉱山株式会社 | Particle measuring device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3791196A (en) * | 1972-03-22 | 1974-02-12 | Wehr Corp | Dilution system for particle analyzer |
US4633706A (en) * | 1983-11-01 | 1987-01-06 | Nippon Soken, Inc. | System for measuring amount of particulates exhausted from vehicle engine |
EP0550045A1 (en) * | 1992-01-02 | 1993-07-07 | Air Products And Chemicals, Inc. | Diffusion gas diluter |
US5332512A (en) * | 1991-12-19 | 1994-07-26 | Pacific Scientific Company | Isokinetic diluter for particle measuring instrument |
US5410907A (en) * | 1993-08-25 | 1995-05-02 | White Consolidated Ind Inc | Gas sampling method and dilution tunnel therefor |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3822095A (en) * | 1972-08-14 | 1974-07-02 | Block Engineering | System for differentiating particles |
US5062713A (en) * | 1989-09-06 | 1991-11-05 | The Dow Company | Method for determining the residence time distribution of a polymer extruder |
US5074158A (en) * | 1990-08-03 | 1991-12-24 | Hajime Industries Ltd. | Powder granule sample inspection apparatus |
JP3115641B2 (en) * | 1991-04-24 | 2000-12-11 | シスメックス株式会社 | Particle counting method |
EP0540035A3 (en) * | 1991-10-31 | 1993-12-01 | Hughes Aircraft Co | Sensor for monitoring solutes in a liquid stream |
US5416580A (en) * | 1993-07-07 | 1995-05-16 | General Signal Corporation | Methods and apparatus for determining small particle size distribution utilizing multiple light beams |
US5568266A (en) * | 1994-09-28 | 1996-10-22 | Mts Colorimetrie | Colorimeter and colorimetrical control device |
JP3308441B2 (en) * | 1995-12-19 | 2002-07-29 | シスメックス株式会社 | Urine particle analyzer |
US5801820A (en) * | 1996-03-19 | 1998-09-01 | Shell Oil Company | Flow-injection gradient dilution for obtaining UV spectra of concentrated solutions |
-
1998
- 1998-02-25 US US09/030,463 patent/US6020960A/en not_active Expired - Fee Related
-
1999
- 1999-02-23 WO PCT/US1999/003832 patent/WO1999044034A1/en not_active Application Discontinuation
- 1999-02-23 JP JP2000533734A patent/JP2002529683A/en active Pending
- 1999-02-23 EP EP99936115A patent/EP1058828A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3791196A (en) * | 1972-03-22 | 1974-02-12 | Wehr Corp | Dilution system for particle analyzer |
US4633706A (en) * | 1983-11-01 | 1987-01-06 | Nippon Soken, Inc. | System for measuring amount of particulates exhausted from vehicle engine |
US5332512A (en) * | 1991-12-19 | 1994-07-26 | Pacific Scientific Company | Isokinetic diluter for particle measuring instrument |
EP0550045A1 (en) * | 1992-01-02 | 1993-07-07 | Air Products And Chemicals, Inc. | Diffusion gas diluter |
US5410907A (en) * | 1993-08-25 | 1995-05-02 | White Consolidated Ind Inc | Gas sampling method and dilution tunnel therefor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024013650A1 (en) * | 2022-07-15 | 2024-01-18 | Agilent Technologies, Inc. | A sample delivery system for an analytical instrument |
Also Published As
Publication number | Publication date |
---|---|
EP1058828A1 (en) | 2000-12-13 |
US6020960A (en) | 2000-02-01 |
JP2002529683A (en) | 2002-09-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6007235A (en) | Sampling and diluting system for particle size distribution measurement | |
US7434449B2 (en) | Exhaust gas analyzer | |
EP0278520B1 (en) | Automatic dilution system | |
US6178830B1 (en) | In-line diluting extractor | |
EP0428850A1 (en) | Multi-pipe flow-dividing dilution system | |
EP1592957B1 (en) | Multi-stage dilution system and method | |
US8875564B2 (en) | Method and device for detecting contaminants in a fluid | |
US6020960A (en) | System for the in-line extraction and dilution of a representative sample of a processed medium | |
CN101241063B (en) | Cigarette flue gas aerosol grain size distribution detection method | |
EP2414808B1 (en) | System for taking exhaust gas samples from internal combustion engines | |
EP3245494A1 (en) | Exhaust-gas sampling system, and method for operating an exhaust-gas sampling system of said type | |
WO2020038658A1 (en) | Particle-measuring system having a dilution device, and method for measuring particles | |
US3829584A (en) | Continuous separating and standardizing of milk | |
US7294307B2 (en) | Apparatus for pumping and directing fluids for hematology testing | |
GB1464235A (en) | Method and apparatus for automated quantitative fluid analysis | |
DE2600324A1 (en) | METHOD AND DEVICE FOR ANALYZING LIQUID SAMPLES | |
CN107677526A (en) | A kind of sample pre-treatments system and method for online water analysis instrument | |
DE2827537A1 (en) | OPERATING METHOD FOR A LEAK DETECTING DEVICE, GAS ANALYSIS OR THE LIKE. AND SUITABLE FURNITURE | |
FI107645B (en) | An automatic sampling and processing system | |
US4827775A (en) | Apparatus for extracting a sample | |
DE102007032951B4 (en) | Apparatus and method for supplying a liquid flow from at least two liquid sections into a measuring cell | |
DE102012008423A1 (en) | Device for sampling aggregate gas distribution network under increased pressure in gas grid, has flow resistor provided in flow path of gas and passed through gas with sound velocity so as to adjust mass flux during sampling operation | |
EP0344618B1 (en) | Gas-sampling device | |
CN208568386U (en) | Semi continuous automatic sampling system | |
JPS6227645A (en) | Gas sampling apparatus |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CA JP |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1999936115 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref country code: JP Ref document number: 2000 533734 Kind code of ref document: A Format of ref document f/p: F |
|
WWP | Wipo information: published in national office |
Ref document number: 1999936115 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1999936115 Country of ref document: EP |