Patent US4188300A successfully refreshed from Google Patents.
US4188300A
Expired / Lapsed
US
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Cosulfurized olefin and lard oil
Assignee: Mayco Oil and Chemical Co Inc
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Filing: 1973-04-05
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Granted: 1980-02-12
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Expires: 1993-04-05
Abstract
Abstract A lubricity additive soluble in paraffinic lubes is prepared by cosulfurizing a blend of 90 to 50 and preferably 88 to 70 parts by volume of lard oil having a free acid content of less than 0.5 wt. % and preferably less than 0.2 wt. % and a pour point of 35°-40° F. and an olefin containing 2 to 24 carbon atoms at from 365° to 445° F. for 20 minutes to 10 hours followed by blowing with a gas to remove hydrogen sulfide.
Inventors
- 👤 Henry E. Sanson, III
- 👤 Wallace R. Hartman, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:47
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/02; C07; C07G; C07G99/00; C07G99/002; C07G99/0022; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
A composition comprising a cosulfurized blend of from 50 to 90 parts by volume of lard oil containing free fatty acid but below 0.5 weight percent calculated as oleic acid and having a pour point of 35° to 40° F., and from 50 to 10 parts by volume of a hydrocarbon containing from 2 to about 24 carbon atoms and having the structure ##STR2## wherein R 1 , R 2 and R 3 are either hydrogen or alkyl and R 4 is either hydrogen, alkyl, aryl, cycloalkyl or alkaryl, which cosulfurized blend contains chemically combined therewith from 5 to 25 weight percent as based on said blend of sulfur.
Claim 2
Dependent Claim
109 words
A composition comprising a cosulfurized blend of from 50 to 90 parts by volume of lard oil containing free fatty acid but below 0.5 weight percent calculated as oleic acid and having a pour point of 35° to 40° F., and from 50 to 10 parts by volume of a hydrocarbon containing from 2 to about 24 carbon atoms and having the structure ##STR2## wherein R 1 , R 2 and R 3 are either hydrogen or alkyl and R 4 is either hydrogen, alkyl, aryl, cycloalkyl or alkaryl, which cosulfurized blend contains chemically combined therewith from 5 to 25 weight percent as based on said blend of sulfur.
Claim 3
Dependent Claim
10 words
The composition of claim 1 wherein R 4 is alkyl.
Claim 4
Dependent Claim
16 words
The composition of claim 2 wherein R 1 , R 2 and R 3 are hydrogen.
Claim 5
Dependent Claim
29 words
The composition of claim 3 wherein from 88 to 70 parts by volume of lard oil and from 12 to 30 parts by volume of the hydrocarbon is present.
Claim 6
Dependent Claim
15 words
The composition of claim 4 wherein from 5 to 15 weight percent sulfur is present.
Claim 7
Dependent Claim
15 words
The composition of claim 5 wherein the hydrocarbon contains from 15 to 20 carbon atoms.
Claim 8
Dependent Claim
23 words
The composition of claim 6 wherein the lard oil has a free acid content of below 0.2 weight percent calculated as oleic acid.
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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) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-11 | 1987-08-13 | 1988-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-11 | 1991-08-13 | 1992-02-12 | $7700.00 | Window Closed / Lapsed |