US3979308A
Expired / Lapsed
US
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Lubricant compositions with improved viscosity index
Assignee: Texaco Inc
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Filing: 1974-03-27
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Granted: 1976-09-07
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Expires: 1994-03-27
Abstract
Abstract Disclosed are lubricant compositions containing adducts of an amine with a phosphate ester of the formula: ##EQU1## wherein R is hydrogen or alkyl having up to 25 carbon atoms in the chain, R' is hydrogen or alkyl having up to 7 carbon atoms except only one of R and R' can be hydrogen or octyl.
Inventors
- 👤 Theodore C. Mead
- 👤 Richard T. McDill
- 👤 Ralph P. Chesluk
- 👤 Norman R. Odell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:53
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/043; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A lubricating composition comprising a major amount of a mineral lubricating oil and a minor viscosity index improving amount of an adduct of an amine selected from the group consisting of cyclohexyl piperidine, furfuryl amine and amines of the formula: ##EQU2## wherein the substituents are either hydrogen, alkyl or aryl groups having up to 30 carbon atoms with ethyl oleyl acid orthophosphate, the adduct being formed at a temperature of above about 200°F and wherein the amine is present in about a stoichiometric quantity.
Claim 2
Dependent Claim
84 words
A lubricating composition comprising a major amount of a mineral lubricating oil and a minor viscosity index improving amount of an adduct of an amine selected from the group consisting of cyclohexyl piperidine, furfuryl amine and amines of the formula: ##EQU2## wherein the substituents are either hydrogen, alkyl or aryl groups having up to 30 carbon atoms with ethyl oleyl acid orthophosphate, the adduct being formed at a temperature of above about 200°F and wherein the amine is present in about a stoichiometric quantity.
Claim 3
Dependent Claim
14 words
The composition of, claim 1 wherein said adduct is ethyl oleyl acid orthophosphate-α-methylbenzyl amine.
Claim 4
Dependent Claim
14 words
The composition of, claim 1 wherein said adduct is ethyl oleyl acid orthophosphate-N-cyclohexyl piperidine.
Claim 5
Dependent Claim
14 words
The composition of, claim 1 wherein said adduct is ethyl oleyl acid orthophosphate-furfuryl amine.
Claim 6
Dependent Claim
14 words
The composition of, claim 1 wherein said adduct is ethyl oleyl acid orthophosphate-isobutyl amine.
References Cited (Backward Citations)
US2371852A
Cited
US3000820A
Cited
US3203895A
Cited
US3336237A
Cited
US3720612A
Cited
US3859218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |