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US4174284A
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Hydrocarbylpolythiobenzoic acids as anti-oxidation additives
Assignee: Phillips Petroleum Co
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Filing: 1978-08-14
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Granted: 1979-11-13
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Expires: 1998-08-14
Abstract
Abstract Liquid hydrocarbon-containing organic compositions have considerably improved anti-oxidation properties when a hydrocarbylpolythiobenzoic acid is present in the composition.
Inventors
- 👤 Albert W. Borel
- 👤 Bernard A. Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:34
CPC Classifications
C; C10; C10M; C10M133/00; C10M133/02; C10M133/26; C10M133/28; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/085
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
19 words
An organic composition comprising a major proportion of a hydrocarbon liquid and an oxidation-inhibiting amount of a hydrocarbylpolythiobenzoic acid.
Claim 2
Dependent Claim
19 words
An organic composition comprising a major proportion of a hydrocarbon liquid and an oxidation-inhibiting amount of a hydrocarbylpolythiobenzoic acid.
Claim 3
Dependent Claim
54 words
A composition in accordance with claim 1 wherein said hydrocarbylpolythiobenzoic acid is selected from the group consisting of: ##STR2## wherein R is an alkyl, cycloalkyl or aromatic hydrocarbon radical having from 2 to about 36 carbon atoms, R' is hydrogen or R, R" is hydrogen, and n is an integer from 2 to 8.
Claim 4
Dependent Claim
27 words
A composition in accordance with claim 2 wherein R contains from about 10 to about 18 carbon atoms and n is an integer from 2 to 4.
Claim 5
Dependent Claim
19 words
The composition of claim 1 comprising from about 0.1 to about 6 percent by weight of said hydrocarbylpolythiobenzoic acid.
Claim 6
Dependent Claim
19 words
The composition of claim 1 comprising from about 0.5 to about 2 percent by weight of said hydrocarbylpolythiobenzoic acid.
Claim 7
Dependent Claim
13 words
The composition of claim 1 wherein said hydrocarbon liquid is a lubricating oil.
Claim 8
Dependent Claim
15 words
The composition of claim 6 wherein said lubricating oil is based on a mineral oil.
Claim 9
Dependent Claim
20 words
The composition of claim 2 wherein said hydrocarbylpolythiobenzoic acid is selected from the group of 2-n-octyldithiobenzoic acid or 2-n-dodecyldithiobenzoic acid.
Claim 10
Independent Claim
23 words
A method for rendering a hydrocarbon liquid resistant to oxidation by incorporating into said hydrocarbon liquid an oxidation-inhibiting amount of a hydrocarbylpolythiobenzoic acid.
Claim 11
Independent Claim
23 words
A method for rendering a hydrocarbon liquid resistant to oxidation by incorporating into said hydrocarbon liquid an oxidation-inhibiting amount of a hydrocarbylpolythiobenzoic acid.
Claim 12
Dependent Claim
40 words
A method in accordance with claim 9 wherein said hydrocarbon liquid is a lubricating oil and the hydrocarbylpolythiobenzoic acid is incorporated into said lubricating oil in the range of about 0.1 to 6 percent by weight of the total composition.
Claim 13
Dependent Claim
30 words
A method in accordance with claim 10 wherein said hydrocarbylpolythiobenzoic acid is incorporated at a weight percent in the range of about 0.5 to about 2 of the total composition.
Claim 14
Dependent Claim
17 words
A method in accordance with claim 9 wherein said hydrocarbylpolythiobenzoic acid is 2-n-octyldithiobenzoic acid or 2-n-dodecyldithiobenzoic 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) | 1982-11-12 | 1983-05-14 | 1983-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-12 | 1987-05-14 | 1987-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-12 | 1991-05-14 | 1991-11-13 | $7700.00 | Window Closed / Lapsed |