US3986966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cosulfurized products of high iodine valve triglyceride and nonwax ester of monoethenoid fatty acid as lubricant additives
Assignee: Shell USA Inc
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Filing: 1975-03-17
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Granted: 1976-10-19
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Expires: 1995-03-17
Abstract
Abstract A cosulfurized product of a mixture of (a) a triglyceride having an iodine value greater than 80, preferably rapeseed oil, and (b) nonwax ester comprising the methyl ester of a fatty acid having from 18 to 22 carbon atoms or a mixture thereof, said fatty acid being predominantly monoethylenically unsaturated, has excellent extreme pressure and low temperature properties and is an effective substitute for sulfurized sperm oil.
Inventors
- 👤 Jamil M. Wakim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:37
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/02; C10M135/06; C10M2203/00; C10M2203/10; C10M2203/108; C10M2219/00; C10M2219/02; C10M2219/024; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
A lubricant composition comprising a lubricating oil and from about 0.1 to about 20% by weight on the composition of a cosulfurized mixture of (a) a triglyceride having an iodine value greater than 80 and (b) nonwax ester comprising the methyl ester of a fatty acid having from 18 to 22 carbon atoms or a mixture thereof, said fatty acid being predominantly monoethylenically unsaturated, wherein the sulfur content of the cosulfurized mixture of (a) and (b) is from about 1 to about 40% by weight and wherein the weight ratio of (a):(b) is in the range of from about 0.1:1 to about 10:1.
Claim 2
Dependent Claim
103 words
A lubricant composition comprising a lubricating oil and from about 0.1 to about 20% by weight on the composition of a cosulfurized mixture of (a) a triglyceride having an iodine value greater than 80 and (b) nonwax ester comprising the methyl ester of a fatty acid having from 18 to 22 carbon atoms or a mixture thereof, said fatty acid being predominantly monoethylenically unsaturated, wherein the sulfur content of the cosulfurized mixture of (a) and (b) is from about 1 to about 40% by weight and wherein the weight ratio of (a):(b) is in the range of from about 0.1:1 to about 10:1.
Claim 3
Dependent Claim
18 words
A composition according to claim 1 wherein said triglyceride has an iodine value no greater than about 200.
Claim 4
Dependent Claim
18 words
A composition according to claim 2 wherein said triglyceride has an iodine value no greater than about 180.
Claim 5
Dependent Claim
12 words
A composition according to claim 3 wherein said triglyceride is rapeseed oil.
Claim 6
Dependent Claim
18 words
A composition according to claim 4 wherein said nonwax ester is the methyl ester of rapeseed fatty acids.
Claim 7
Dependent Claim
14 words
A composition according to claim 4 wherein said nonwax ester is predominantly methyl oleate.
Claim 8
Dependent Claim
23 words
A composition according to claim 1 wherein the sulfur content of said cosulfurized mixture is from about 5 to about 30% by weight.
Claim 9
Dependent Claim
23 words
A composition according to claim 1 wherein said weight ratio of (a):(b) is in the range of from about 0.3:1 to about 3:1.
Claim 10
Dependent Claim
23 words
A composition according to claim 1 wherein said cosulfurized mixture is present in amount of from about 1 to about 10% by weight.
Claim 11
Dependent Claim
19 words
A composition according to claim 7 wherein the sulfur content of said cosulfurized mixture is about 10% by weight.
References Cited (Backward Citations)
US3740333A
Cited
US3850825A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |