US2305560A - Steam cylinder oil - Google Patents
Steam cylinder oil Download PDFInfo
- Publication number
- US2305560A US2305560A US416755A US41675541A US2305560A US 2305560 A US2305560 A US 2305560A US 416755 A US416755 A US 416755A US 41675541 A US41675541 A US 41675541A US 2305560 A US2305560 A US 2305560A
- Authority
- US
- United States
- Prior art keywords
- steam
- acids
- oil
- oils
- stock
- 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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- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/045—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution and non-macromolecular compounds
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- C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
- C10M101/02—Petroleum fractions
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- C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
- C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
- C10M129/26—Carboxylic acids; Salts thereof
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- C10M129/28—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M129/38—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 8 or more carbon atoms
- C10M129/40—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 8 or more carbon atoms monocarboxylic
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- C10M129/56—Acids of unknown or incompletely defined constitution
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- C10M135/10—Sulfonic acids or derivatives thereof
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- C10N2060/00—Chemical after-treatment of the constituents of the lubricating composition
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Definitions
- This invention relates to lubricating oils, and more particularly to compounded lubricants which are effective in the presence of steam, i. e. are suitable for use in the lubrication of steam engines and the like.
- Lubricants to be used in steam engines must possess certain properties not required of most lubricants. In such engines the temperatures may be of the order of 550 F. and higher if superheated steam is employed, and accordingly the lubricant must have high heat-resisting qualities to prevent gumming and carbon formation.
- the presence of moisture in a steam engine is inherent in its operation, even though such engines may be operated with superheated or dry steam; at certain stages in the operation moisture or wet steam will usually be present. Moisture tends to scour the metal parts free of oil and prevent the spread of oil over the surface to be lubricated. As a-result the relative movements of various metal parts may become jerky due to increased friction.
- the lubrication of the moving parts of such engines is usually accomplished by atomizing the lubricant through a quill into the steam line and utilizing the steam to carry the lubricant to the moving parts.
- superheated steam added a dispersing agent and petroleum resins, the various components being selected as will be described in the following.
- Oils for use as base stocks in the compounding conditions and they should be free from asis not a good carrying medium for lubricating oil, the latter must be readily atomizable to be effective in the presence of dry steam. Further, I
- oils must be thermally stable to prevent carbon deposits from forming and clogging the quill.
- my new steam cylinder oil which comprises a heavy, asphalt-free lubricating oil to which have been phaltenes which readily carbonize and thereby interfere with proper lubrication.
- reflned oils are preferred for reasons of preventing formation of coke-like material on heated metal parts to .be lubricated.
- oils which readily oxidize, thereby forming excessive amounts of acidic oxidation products and sludge, should be avoided because they may cause severe corrosion fural; nitrobenzene, .phenol, cresols, dichlordi ethylether, antimony trichloride, etc.; or of a pair of mutually immiscible solvents, one being selective for aromatics and the other for parafiins,
- refining methods may comprise treating with sulfuric acid, clay, aluminum chloride, etc.
- Petroleum resins as herein defined are highboiling organic compounds normally contained in unextracted bright stocks, which compounds are completely soluble in 86 B. naphtha, possess molecular weights in excess of about 500, have specific dispersions above 200, and contain substantial proportions frequently of the order of 3 Or more of components adsorbable on silica gel or other acidic adsorbents and the recovery of the adsorbed compounds, etc. Methods for producing such resins are described in Merrill.
- useful amounts of resins to be added range from about 1%-l5% by weight of the base stock, and more often from 2%-10%
- a minor proportion of the order of 05% to 1%, and preferably from .1% to 5%, of a dispersing or emulsify agent capable of spreading hydrocarbon oil on metal surfaces wetted by water is added.
- Such an additive preferably comprises a salt of an alkali metal with an organic detergent-forming acid.
- alkaline earth metals or amino base salts with such acids may be used.
- the organic detergent-forming acids may comprise, for example, carboxylic acids of the type RCOOH, such as lauric, palmitio, stearic, oleic, linoleic, ricinoleic acids, oxidized parafiin acids, tall oil acid, rosin acids, abietic acid, wool fat acids, naphthenic acids, alkylated benzoic and naphthoic acids.
- carboxylic acids of the type RCOOH such as lauric, palmitio, stearic, oleic, linoleic, ricinoleic acids, oxidized parafiin acids, tall oil acid, rosin acids, abietic acid, wool fat acids, naphthenic acids, alkylated benzoic and naphthoic acids.
- aromatic fatty acids such as phenyl stearic acid, terpenic acids, etc.
- acids of the sulfonic acid type RSO3H for example petroleum sulfonic acids such as the mahogany acids or green acids produced in the manufacture of medicinal oils by treatment with fuming sulfuric acid of parafiinic mineral oils such as lube oil, etc.; or of various aliphatic or alicyclic sulfonic acids such as fatty sulfonic acids, fatty aromatic sulfonic acids, naphthene sulfonic acids; or of sulfonic acids of various aromatic hydrocarbons, particularly those which contain one or more alkyl radicals and which may contain non-functional substituents, such as various alkylated benzenes, diphenyls, xylenes, diphenyl methanes, naphthalenes, anthracenes, phenanthrenes, tetralines; alkyl phenols such as those contained in cracked petroleum
- ROSOsH for example turkey red oil, sulfated fish oils, sulfated fatty acids such as mono lauryl, cety
- a convenient source for many of the active sulfate ester acids is the sludges obtained in the. acid treatment of cracked distillates, or the spent acids obtained in the polymerization of olefines or in the alkylation of isoparaffins with olefines with sulfuric acid.
- Suitable organic detergent-forming acids such as have been described in the foregoing may, if desired, contain non-functional radicals such as halogen, hydroxyl, ether, amino, imino, hydrosulfide, sulfide, vcarboxyl ester, etc.
- Fatty oils such as tallow, frequently used as steam cylinder oils, should be avoided as under superheat conditions they decompose and form deposits of carbon as well as corrosive acids.
- a piston in a steam engine was lubricated with a fixed quantity of the oil under test, after which it was run as long as possible at a constant steam pressure Without the addition of further amounts of oil.
- the number of strokes made and the smoothness of operation were noted and were taken as indicative of the quality of the oil.
- a stroke counter was attached to the pump.
- the testing procedure was as follows: The lubricator and its connection to the pump were carefully cleaned with gasoline and ether. They were then flushed and filled with the oil to be tested. The pump was then operated at a constant speed for 60 minutes, with the lubricating feed set at a definite rate. Lubrication was then stopped, the stroke counter placed in position, and the operation of the pump continued at the constant speed. The strokes were counted until the pump would no longer operate at 2.50 pounds pressure. The type of operation of the pump was carefully observed throughout the test and judged as smooth, jerky, or very jerky.
- oils were subjected to a second test to determine their chemical vstability under high temperatures of the order of 550 F. attained by employing superheated or dry steam. They were injected into a highly superheated steam line through a quill, simulating actual engine lubrication practiced over a period of time.
- a steam cylinder lubricating oil consisting essentially of a mineral lubricating oil free from asphaltenes and of viscosity suitable for steam cylinder oil containing a minor proportion of a dispersing agent selected from the group consisting of salts of alkali metals, alkali earth metals and amines with organic detergent forming acids, which agent is capable of spreading hydrocarbon oil on metal surfaces wetted by water, and from about 1% to (about 15% by weight of added petroleum resins.”
- composition of claim 1 in which the lubricating oil is a refined hydrocarbon oil of a viscosity of the order of 100-300 seconds S. U. at 210 F,
- composition of claim 1 in which the amount of the dispersing agent is between .05% and 1%.
- composition of claim 1 in which the amount of the dispersing agent is between about .l% and about 5%.
- a steam cylinder lubricating oil consisting essentially of a mineral lubricating oil free from asphaltenes and of viscosity suitable for steam' cylinder oil containing a minor proportion of an alkali metal salt of an organic detergent-forming acid and from about 1% to about 15% by Weight of added petroleum resins.
- a steam cylinder lubricating oil consisting essentially of a mineral lubricating oil free from asphaltenes and of viscosity suitable for steam cylinder oil containing a minor proportion of an amino base salt of an organic detergent-forming acid and from about 1% to about 15% by weight of added petroleum resins.
- a steam cylinder lubricating oil consisting essentially of a mineral lubricating oil free from asphaltenes and of viscosity suitable for steam cylinder oil containing a minor proportion of an alkaline earth metal salt of an organic detergentforming acid and from about 1% to about 15% by weight of added petroleum resins.
- a steam cylinder lubricating oil consisting essentially of a mineral lubricating oil free from asphaltenes and of viscosity suitable for steam cylinder oil containing a minor proportion of sodium oleate and from about 1% to about 15% by weight of petroleum resins.
- a steam cylinder lubricating oil consisting essentially of a mineral lubricating oil free, from asphaltenes and of viscositysuitable for steam cylinder oil containing a minor proportion of an ture is introduced into a steam cylinder.
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Lubricants (AREA)
- Detergent Compositions (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Description
Patented Dec. 15, 1942 STEAM CYLINDER on.
Knapel F. Schiermeier, Alton, Ill., assignor to Shell Development Company, San Francisco, Calilfl, a corporation of Delaware No Drawing. Application October 27, 1941,
' Serial No. 416,755
10 Claims. (Cl. ass-4s) This invention relates to lubricating oils, and more particularly to compounded lubricants which are effective in the presence of steam, i. e. are suitable for use in the lubrication of steam engines and the like.
Lubricants to be used in steam engines must possess certain properties not required of most lubricants. In such engines the temperatures may be of the order of 550 F. and higher if superheated steam is employed, and accordingly the lubricant must have high heat-resisting qualities to prevent gumming and carbon formation. The presence of moisture in a steam engine is inherent in its operation, even though such engines may be operated with superheated or dry steam; at certain stages in the operation moisture or wet steam will usually be present. Moisture tends to scour the metal parts free of oil and prevent the spread of oil over the surface to be lubricated. As a-result the relative movements of various metal parts may become jerky due to increased friction.
The lubrication of the moving parts of such engines is usually accomplished by atomizing the lubricant through a quill into the steam line and utilizing the steam to carry the lubricant to the moving parts. Inasmuch as superheated steam added a dispersing agent and petroleum resins, the various components being selected as will be described in the following.
Oils for use as base stocks in the compounding conditions, and they should be free from asis not a good carrying medium for lubricating oil, the latter must be readily atomizable to be effective in the presence of dry steam. Further, I
such oils must be thermally stable to prevent carbon deposits from forming and clogging the quill.
It is an object of this invention to provide a lubricant having greater utility in the presence of steam than had lubricants heretofore provided for such a purpose. It is another object of this invention to provide a lubricant for use in the presence of dry or wet steam. Another object of this invention is to provide an oil that will read ly spread to provide an oil film on a surface to be lubricated in the presence of steam. Still another object is to provide an oil of greater adherence to metal surfaces in the presence of steam than oils heretofore employed. A further object is to provide an oil that is thermally stable in the presence of superheated steam.
I have found that one or more of the foregoing objects can be achieved with the aid of my new steam cylinder oil which comprises a heavy, asphalt-free lubricating oil to which have been phaltenes which readily carbonize and thereby interfere with proper lubrication. Pennsylvania steam-reduced or, preferably,.clay-filtered stocks or Midcontinent or California deasphalted or, if desired, solvent-extracted bright stocks, are suitable. In general, reflned oils are preferred for reasons of preventing formation of coke-like material on heated metal parts to .be lubricated. On the other hand, over-treated oils which readily oxidize, thereby forming excessive amounts of acidic oxidation products and sludge, should be avoided because they may cause severe corrosion fural; nitrobenzene, .phenol, cresols, dichlordi ethylether, antimony trichloride, etc.; or of a pair of mutually immiscible solvents, one being selective for aromatics and the other for parafiins,
such as phenol and propane, etc.
Other refining methods may comprise treating with sulfuric acid, clay, aluminum chloride, etc.
Petroleum resins as herein defined are highboiling organic compounds normally contained in unextracted bright stocks, which compounds are completely soluble in 86 B. naphtha, possess molecular weights in excess of about 500, have specific dispersions above 200, and contain substantial proportions frequently of the order of 3 Or more of components adsorbable on silica gel or other acidic adsorbents and the recovery of the adsorbed compounds, etc. Methods for producing such resins are described in Merrill.
, contain appreciable amounts of resins naturally associated therewith, and such oils obviously require smaller quantities of additional resins than stocks which are substantially devoid of them. However, as a rule, the natural content of resins is insufficient for best results, and oils which naturally contain resins invariably are benefited by the further addition of resins, although perhaps not to so large an extent as oils originally free of resins.
As a rule, useful amounts of resins to be added range from about 1%-l5% by weight of the base stock, and more often from 2%-10% To the mixture of base stock and petroleum resins, a minor proportion of the order of 05% to 1%, and preferably from .1% to 5%, of a dispersing or emulsify agent capable of spreading hydrocarbon oil on metal surfaces wetted by water is added. Such an additive preferably comprises a salt of an alkali metal with an organic detergent-forming acid. However, alkaline earth metals or amino base salts with such acids may be used.
The organic detergent-forming acids may comprise, for example, carboxylic acids of the type RCOOH, such as lauric, palmitio, stearic, oleic, linoleic, ricinoleic acids, oxidized parafiin acids, tall oil acid, rosin acids, abietic acid, wool fat acids, naphthenic acids, alkylated benzoic and naphthoic acids. aromatic fatty acids such as phenyl stearic acid, terpenic acids, etc.; acids of the sulfonic acid type RSO3H, for example petroleum sulfonic acids such as the mahogany acids or green acids produced in the manufacture of medicinal oils by treatment with fuming sulfuric acid of parafiinic mineral oils such as lube oil, etc.; or of various aliphatic or alicyclic sulfonic acids such as fatty sulfonic acids, fatty aromatic sulfonic acids, naphthene sulfonic acids; or of sulfonic acids of various aromatic hydrocarbons, particularly those which contain one or more alkyl radicals and which may contain non-functional substituents, such as various alkylated benzenes, diphenyls, xylenes, diphenyl methanes, naphthalenes, anthracenes, phenanthrenes, tetralines; alkyl phenols such as those contained in cracked petroleum distillates; alkylated chlornaphthalene's, naphthylamines, diphenyl oxides, chlorinated diphenyl oxides, diphenyl sulfides, diphenyl amines, phenyl naphthylamines, dinaphthyl oxides, sulfides, or amines; alkylated pyridines, quinolines, isoquinolines, pyrral, pyrrolidines, piperidine. thiophenes, thiophanes, etc.; or of various sulfonic acids of carboxylic acid esters or amides: acids of the sulfuric acid ester type, ROSOsH, for example turkey red oil, sulfated fish oils, sulfated fatty acids such as mono lauryl, cetyl, stearyl, etc, sulfate acids; or mono esters of sulfuric acid obtained by treating with strong to moderately strong sulfuric acid various olefines or alcohols such as the long-chain oleflnes obtained in the vapor phase cracking of wax at about 550 C- 560 C., polymers obtained in the polymerization of normally gaseous olefines with inorganic polyoxy acids or Friedel-Crafts catalysts, fatty or naphthenic alcohols obtained in the catalytic reduction of fatty or naphthenic acids, alcohols obtained by condensation of ketones or aldehydes followed by hydrogenation; or alkyl aromatic mono esters of sulfuric acid, etc. A convenient source for many of the active sulfate ester acids is the sludges obtained in the. acid treatment of cracked distillates, or the spent acids obtained in the polymerization of olefines or in the alkylation of isoparaffins with olefines with sulfuric acid. Suitable organic detergent-forming acids such as have been described in the foregoing may, if desired, contain non-functional radicals such as halogen, hydroxyl, ether, amino, imino, hydrosulfide, sulfide, vcarboxyl ester, etc.
Fatty oils such as tallow, frequently used as steam cylinder oils, should be avoided as under superheat conditions they decompose and form deposits of carbon as well as corrosive acids.
It will be understood that the foregoing order of mixing of the various components of my compounded oil need not be observed.
In order to evaluate the lubricants prepared in accordance with the invention, the following experiments were performed.
A piston in a steam engine was lubricated with a fixed quantity of the oil under test, after which it was run as long as possible at a constant steam pressure Without the addition of further amounts of oil. The number of strokes made and the smoothness of operation were noted and were taken as indicative of the quality of the oil. Thus, an oil that was well dispersed and adhered to the surface to be lubricated in the preskept well oiled so that practically all load on the pump was due only to friction in the steam end. A stroke counter was attached to the pump.
The testing procedure was as follows: The lubricator and its connection to the pump were carefully cleaned with gasoline and ether. They were then flushed and filled with the oil to be tested. The pump was then operated at a constant speed for 60 minutes, with the lubricating feed set at a definite rate. Lubrication was then stopped, the stroke counter placed in position, and the operation of the pump continued at the constant speed. The strokes were counted until the pump would no longer operate at 2.50 pounds pressure. The type of operation of the pump was carefully observed throughout the test and judged as smooth, jerky, or very jerky.
In order to prevent test from being afiected by carryover from a previous oil which might have remained in the pump, a blank run was made on unfiltered bright stock between each stock on a different oil. Consecutive tests on different oils would not be run until a correct result was obtained for the intermediate blank bright stock test.
The following table shows the results of comparative tests as above outlined in the presence of wet steam on the newly compounded oils of the invention with conventional steam lubricating oil.
oii s mpl Siwkes gli li r ii 150 at 210 F. Unfiltered bright stock.
. 150 at 210 F. Unfiltered bright stock I plus 8% acidless tallow.
. 150 at 210 F. Unfiltered bright stock 1 plus 5% petroleum resin plus 2% sodium oleate.
. 150 at 210 F. Dewaxed steamrefined stock.
. 150 at 210 F. Dewaxed steamrefined stock plus 8% tallow.
6. 150 at 210 F. Dewaxed steamretlned stock plus, 5% petroleum resins.
7. 150 at 210 F. Dewaxed steamrefined stock 1 plus 2% sodium oleate.
8. 150 at 210 F. Dewaxed steamrefined stock plus 5% petroleum resins plus .2% sodium oleate. 9. l50 at 210 F. -Dewaxed steamrefined stock plus 4%.petroleum resins lus .2% sodium oleate'plus .3 0 sodium sulfonate of petroleum.
Less than 500.
Very jerky.
Smooth.
Less than 500. Very jerky.
13,400. l Smooth.
1 Midoontinent residual stock, propane-deasphalted and dewaxed. I Duosol extracted stock, propane-deasphalted and dewaxed.
The above results show that the newly compounded oils (Examples 3, 8, 9) gave far better results than conventional unblended oils or oils blended with a soap or tallow. The effect of the combination of petroleum resins with soap in the oils of the invention is more than additive in that, as will be noted from the table, the combination improved operation far more than might be expected from the effect of soap or petroleum resins when added alone to a lubricating stock.
The oils were subjected to a second test to determine their chemical vstability under high temperatures of the order of 550 F. attained by employing superheated or dry steam. They were injected into a highly superheated steam line through a quill, simulating actual engine lubrication practiced over a period of time.
It was found that compounded oils containing tallow'decomposed on the quill, tarnished it, and
formed carbonaceous deposits, while the steamoleate-resin blends left the quill bright and free of any deposits.
I claim as my invention:
' 1. A steam cylinder lubricating oil consisting essentially of a mineral lubricating oil free from asphaltenes and of viscosity suitable for steam cylinder oil containing a minor proportion of a dispersing agent selected from the group consisting of salts of alkali metals, alkali earth metals and amines with organic detergent forming acids, which agent is capable of spreading hydrocarbon oil on metal surfaces wetted by water, and from about 1% to (about 15% by weight of added petroleum resins."
2. The composition of claim 1 in which the lubricating oil is a refined hydrocarbon oil of a viscosity of the order of 100-300 seconds S. U. at 210 F,
3. The composition of claim 1 in which the amount of the dispersing agent is between .05% and 1%.
4. The composition of claim 1 in which the amount of the dispersing agent is between about .l% and about 5%.
5. A steam cylinder lubricating oil consisting essentially of a mineral lubricating oil free from asphaltenes and of viscosity suitable for steam' cylinder oil containing a minor proportion of an alkali metal salt of an organic detergent-forming acid and from about 1% to about 15% by Weight of added petroleum resins.
6. A steam cylinder lubricating oil consisting essentially of a mineral lubricating oil free from asphaltenes and of viscosity suitable for steam cylinder oil containing a minor proportion of an amino base salt of an organic detergent-forming acid and from about 1% to about 15% by weight of added petroleum resins.
7. A steam cylinder lubricating oil consisting essentially of a mineral lubricating oil free from asphaltenes and of viscosity suitable for steam cylinder oil containing a minor proportion of an alkaline earth metal salt of an organic detergentforming acid and from about 1% to about 15% by weight of added petroleum resins.
8. A steam cylinder lubricating oil consisting essentially of a mineral lubricating oil free from asphaltenes and of viscosity suitable for steam cylinder oil containing a minor proportion of sodium oleate and from about 1% to about 15% by weight of petroleum resins.
9. A steam cylinder lubricating oil consisting essentially of a mineral lubricating oil free, from asphaltenes and of viscositysuitable for steam cylinder oil containing a minor proportion of an ture is introduced into a steam cylinder.
KNAPEL F. SCHIERMEIER.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL65989D NL65989C (en) | 1941-10-27 | ||
US416755A US2305560A (en) | 1941-10-27 | 1941-10-27 | Steam cylinder oil |
GB15931/42A GB563632A (en) | 1941-10-27 | 1942-11-11 | Steam cylinder lubricating oil compositions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US416755A US2305560A (en) | 1941-10-27 | 1941-10-27 | Steam cylinder oil |
Publications (1)
Publication Number | Publication Date |
---|---|
US2305560A true US2305560A (en) | 1942-12-15 |
Family
ID=23651178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US416755A Expired - Lifetime US2305560A (en) | 1941-10-27 | 1941-10-27 | Steam cylinder oil |
Country Status (3)
Country | Link |
---|---|
US (1) | US2305560A (en) |
GB (1) | GB563632A (en) |
NL (1) | NL65989C (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2430951A (en) * | 1943-11-27 | 1947-11-18 | Standard Oil Co | Corrosion inhibiting compositions |
US2686488A (en) * | 1948-01-14 | 1954-08-17 | Harley A Montgomery | Method of treating and cold deep drawing sheet metal |
US2820007A (en) * | 1953-11-24 | 1958-01-14 | Shell Dev | Lubricating compositions |
CN108504422A (en) * | 2018-03-26 | 2018-09-07 | 河南道骐汽车科技有限公司 | High temperature polymerization strong wear-resistant steam cylinder oil |
-
0
- NL NL65989D patent/NL65989C/xx active
-
1941
- 1941-10-27 US US416755A patent/US2305560A/en not_active Expired - Lifetime
-
1942
- 1942-11-11 GB GB15931/42A patent/GB563632A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2430951A (en) * | 1943-11-27 | 1947-11-18 | Standard Oil Co | Corrosion inhibiting compositions |
US2686488A (en) * | 1948-01-14 | 1954-08-17 | Harley A Montgomery | Method of treating and cold deep drawing sheet metal |
US2820007A (en) * | 1953-11-24 | 1958-01-14 | Shell Dev | Lubricating compositions |
CN108504422A (en) * | 2018-03-26 | 2018-09-07 | 河南道骐汽车科技有限公司 | High temperature polymerization strong wear-resistant steam cylinder oil |
Also Published As
Publication number | Publication date |
---|---|
NL65989C (en) | |
GB563632A (en) | 1944-08-23 |
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