Patent US4305831A successfully refreshed from Google Patents.
US4305831A
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Lubricant compositions
Assignee: Southwest Petro Chem Inc
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Filing: 1980-09-11
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Granted: 1981-12-15
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Expires: 2000-09-11
Abstract
Abstract Lubricant compositions adapted for use under extreme pressure conditions comprising a major proportion of a lubricating grease, and a minor proportion of an additive consisting essentially of a solid, oil insoluble arylene sulfide polymer, and a metal salt, particularly an alkali metal or alkaline earth metal salt, particularly an alkali metal or alkaline earth metal salt of a phosphorus acid, for example, mono- or dicalcium phosphate, or an alkali metal or alkaline earth metal carbonate exemplified by calcium carbonate, or a mixture of such a phosphate salt and carbonate.
Inventors
- 👤 Andrew L. Johnson, III
- 👤 Ray D. Lawson
- 👤 Jon C. Root
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:31
CPC Classifications
C; C10; C10M; C10M161/00; C10M2201/00; C10M2201/04; C10M2201/041; C10M2201/042; C10M2201/06; C10M2201/062; C10M2201/085; C10M2203/00; C10M2203/10; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/14; C10M2207/141; C10M2221/00; C10M2221/02; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
77 words
A lubricant composition for use under extreme pressure conditions comprising a major proportion of a lubricating oil base grease and a minor proportion of an additive consisting essentially of a mixture of a solid, high melting point, oil insoluble arylene sulfide polymer and a metal salt selected from the group consisting of metal phosphates and metal carbonates, and mixtures thereof, said additive being present in an amount sufficient to impart extreme pressure properties to the lubricating grease.
Claim 2
Dependent Claim
77 words
A lubricant composition for use under extreme pressure conditions comprising a major proportion of a lubricating oil base grease and a minor proportion of an additive consisting essentially of a mixture of a solid, high melting point, oil insoluble arylene sulfide polymer and a metal salt selected from the group consisting of metal phosphates and metal carbonates, and mixtures thereof, said additive being present in an amount sufficient to impart extreme pressure properties to the lubricating grease.
Claim 3
Dependent Claim
33 words
A lubricant composition according to claim 1 wherein the metal salt is an alkali metal or alkaline earth metal phosphate or an alkali metal or alkaline earth metal carbonate, or a mixture thereof.
Claim 4
Dependent Claim
15 words
A lubricant composition according to claim 1 wherein the arylene sulfide polymer is polyphenylene sulfide.
Claim 5
Dependent Claim
17 words
A lubricant composition according to claim 2 wherein the metal salt is monocalcium phosphate or dicalcium phosphate.
Claim 6
Dependent Claim
16 words
A lubricant composition according to claim 2 wherein the alkaline earth metal carbonate is calcium carbonate.
Claim 7
Dependent Claim
32 words
A lubricant composition according to claim 1 wherein the mixture of the arylene sulfide polymer and the metal salt comprises from about 1% to about 10%, by weight, of the lubricant composition.
Claim 8
Dependent Claim
24 words
A lubricant composition according to claim 1 wherein the ratio of arylene sulfide polymer to metal salt is from about 1:9 to about 9:1.
Claim 9
Dependent Claim
18 words
A lubricant composition according to claim 1 wherein a minor proportion of graphite is added to the composition.
Claim 10
Dependent Claim
35 words
A lubricant composition according to claim 1 wherein the lubricating grease is selected from the group consisting of lithium base greases, aluminum complex base greases, calcium complex base greases, barium greases and clay base greases.
Claim 11
Dependent Claim
20 words
A lubricant composition according to claim 1 wherein a minor amount of an inorganic pigment is added to the composition.
Claim 12
Dependent Claim
24 words
A lubricant composition according to claim 2 wherein a mixture of metal salts comprising calcium carbonate and dicalcium phosphate is incorporated in the composition.
Claim 13
Dependent Claim
22 words
A lubricant composition according to claim 10 wherein the inorganic pigment comprises a mixture of ferric oxide, carbon black and titanium dioxide.
Claim 14
Dependent Claim
19 words
A lubricant composition according to claim 1 wherein the metal salt is aluminum phosphate, ferric orthophosphate or cadmium phosphate.
Claim 15
Dependent Claim
32 words
A lubricant composition according to claim 1 wherein the polymer is in the form of a powder, the average particle size of which is in the range of 50 to 150 mesh.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |