US3637500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating compositions
Assignee: BP PLC
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Filing: 1970-07-17
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Granted: 1972-01-25
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Expires: 1990-07-17
Abstract
Abstract Synthetic ester lubricants and certain organic sulfide loadcarrying additives form a synergistic mixture when added to mineral base oils, and there is a marked increase in the loadcarrying properties of the base oil.
Inventors
- 👤 Eric Simon Forbes
- 👤 Keith George Allum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:57
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/30; C10M2207/302; C10M2207/304; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/11; C10M2209/111; C10M2209/112; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/083; C10M2219/085
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
72 words
A lubricating composition which comprises i. a mineral oil in major amount; ii. from 0.1 to 10 percent by weight of a diester selected from di-alkyloctadecan-1,18-dioate, di-alkyl tetracosane-1,24-dioate, di-alkyl phthalate, di-alkyl adipate or di-alkyl sebacate, each of the alkyl groups containing from 1 to 10 carbon atoms, and iii. 0.1 to 10 percent by weight of an organic disulphide selected from di-n-butyl disulphide, di-cyclohexyl disulphide, diphenyl disulphide, dibenzyl disulphide or 2,2-(dicarboethoxy)-diethyl disulphide.
Claim 2
Dependent Claim
19 words
A composition as defined in claim 2 wherein said diester is diethyl sebacate and said disulphide is di-n-butyl disulphide.
Claim 3
Dependent Claim
19 words
A composition as defined in claim 2 wherein said diester is diethyl sebacate and said disulphide is di-cyclohexyl disulphide.
Claim 4
Dependent Claim
19 words
A composition as defined in claim 2 wherein said diester is diethyl sebacate and said disulphide is 2,2-(dicarboethoxy)-diethyl disulphide.
Claim 5
Dependent Claim
19 words
A composition as defined in claim 2 wherein said diester is diethyl sebacate and said disulphide is diphenyl disulphide.
Claim 6
Dependent Claim
19 words
A composition as defined in claim 2 wherein said diester is di-iso-octyl sebacate and said disulphide is diphenyl disulphide.
Claim 7
Dependent Claim
19 words
A composition as defined in claim 2 wherein said diester is dimethyl octadecan-1,18-dioate and said disulphide is di-n-butyl disulphide.
Claim 8
Dependent Claim
19 words
A composition as defined in claim 2 wherein said diester is dimethyl tetracosan-1,24-dioate and said disulphide is di-n-butyl disulphide.
Claim 9
Dependent Claim
19 words
A composition as defined in claim 2 wherein said diester is dimethyl octadecan-1,18-dioate and said disulphide is diphenyl disulphide.
Claim 10
Dependent Claim
19 words
A composition as defined in claim 2 wherein said diester is dimethyl phthalate and said disulphide is di-n-butyl disulphide.
Claim 11
Dependent Claim
19 words
A composition as defined in claim 2 wherein said diester is diethyl adipate and said disulphide is di-n-butyl disUlphide.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |