US3970570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiwear additive mixture
Assignee: Bray Oil Co
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Filing: 1975-12-08
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Granted: 1976-07-20
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Expires: 1995-12-08
Abstract
Abstract An ashless sulfur-free antiwear additive combination with good oxidative stability at high temperatures is disclosed. It consists of a mixture of tricresyl phosphate and pentaerythritol monooleate, said combination exhibiting dramatically enhanced antiwear properties.
Inventors
- 👤 Robert Eugene Pratt
- 👤 John Habzansky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:24
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/10; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/028; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/289; C10M2207/34; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/043; C10M2229/044; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/08; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
43 words
An ashless lubricating composition with good oxidation stability above 300°F., said composition comprising a base oil of lubricating viscosity containing as an antiwear additive combination a mixture of from about 0.25 to 3% tricresyl phosphate and from about 0.25 to 2% pentaerythritol monooleate.
Claim 2
Dependent Claim
43 words
An ashless lubricating composition with good oxidation stability above 300°F., said composition comprising a base oil of lubricating viscosity containing as an antiwear additive combination a mixture of from about 0.25 to 3% tricresyl phosphate and from about 0.25 to 2% pentaerythritol monooleate.
Claim 3
Dependent Claim
26 words
The lubricating composition of claim 1 wherein the antiwear additive combination of tricresyl phosphate and pentaerythritol monooleate is present in a concentration of at least 2%.
Claim 4
Dependent Claim
16 words
The lubricating composition of claim 1 wherein the base oil is a linear alpha-olefin oligomer oil.
Claim 5
Dependent Claim
14 words
The lubricating composition of claim 1 wherein the base oil is a lubricant ester.
Claim 6
Dependent Claim
24 words
The lubricating composition of claim 1 wherein the base oil is a dialkyl benzene wherein the alkyl groups are derived from C 10-15 chloroparaffins.
Claim 7
Dependent Claim
14 words
The lubricating composition of claim 1 wherein the base oil is a silicone oil.
References Cited (Backward Citations)
US3816311A
Cited
US3862048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |