Patent US3944491A successfully refreshed from Google Patents.
US3944491A
Expired / Lapsed
US
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Lubricants
Assignee: Phillips Petroleum Co
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Filing: 1975-01-20
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Granted: 1976-03-16
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Expires: 1995-01-20
Abstract
Abstract The addition of a small amount of an alkylbenzyl mercaptan to lubricating oils, greases, automatic transmission oils, cutting oils, hydraulic fluids, and the like improves the anti-wear properties of the resulting compositions.
Inventors
- 👤 Bernard A. Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:15
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/20; C10M135/22; C10M2205/00; C10M2205/06; C10M2207/00; C10M2207/28; C10M2207/287; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/046; C10M2219/08; C10M2219/082; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2040/00; C10N2040/08; C10N2040/20; C10N2040/22; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
75 words
An improved lubricating composition comprising a mineral lubricating oil having incorporated therein a small quantity sufficient to improve the anti-wear properties of the resulting lubricating composition of an alkylbenzyl mercaptan of the formula ##SPC2## wherein each R is hydrogen or an alkyl group, wherein at least one alkyl group is present in the molecule, and wherein there is a total of from 6 to about 25 carbon atoms in all of the combined R groups.
Claim 2
Dependent Claim
75 words
An improved lubricating composition comprising a mineral lubricating oil having incorporated therein a small quantity sufficient to improve the anti-wear properties of the resulting lubricating composition of an alkylbenzyl mercaptan of the formula ##SPC2## wherein each R is hydrogen or an alkyl group, wherein at least one alkyl group is present in the molecule, and wherein there is a total of from 6 to about 25 carbon atoms in all of the combined R groups.
Claim 3
Dependent Claim
20 words
A composition according to claim 1 wherein the quantity of alkylbenzyl mercaptan present ranges from 0.1 to 4 weight percent.
Claim 4
Dependent Claim
20 words
A composition according to claim 1 wherein the quantity of alkylbenzyl mercaptan present ranges from 0.3 to 2 weight percent.
Claim 5
Dependent Claim
31 words
A composition according to claim 1 wherein there is a total of from about 10 to about 18 carbon atoms in all of the combined R groups of the alkylbenzyl mercaptan.
Claim 6
Dependent Claim
13 words
A composition according to claim 1 wherein the alkylbenzyl mercaptan is dodecylbenzyl mercaptan.
Claim 7
Dependent Claim
31 words
A composition according to claim 1 wherein the alkylbenzyl mercaptan is dodecylbenzyl mercaptan and the amount of said mercaptan present in the lubricating composition ranges from 0.1 to 4 weight percent.
Claim 8
Dependent Claim
36 words
A composition according to claim 1 wherein the lubricating oil has a Saybolt viscosity at 210°F of from about 30 to 250 and the amount of alkylbenzyl mercaptan present ranges from 0.1 to 4 weight percent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |