US4729848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal salts of alkyl catechol dithiophosphoric acids and oil compositions containing the salts
Assignee: Chevron USA Inc
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Filing: 1986-09-08
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Granted: 1988-03-08
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Expires: 2006-09-08
Abstract
Abstract Metal salts of alkyl catechol esters of dithiophosphoric acid suitable as additives in oil compositions are disclosed. Oil compositions containing the salts of such esters show improved extreme pressure/anti-wear and anti-oxidant properties.
Inventors
- 👤 Elaine S. Yamaguchi
- 👤 Thomas V. Liston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:08
CPC Classifications
C; C10; C10M; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657109; C07F9/657127; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/10; C10N2010/12; C10N2010/14; C10N2010/16; C10N2040/00; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
38 words
A compound of the formula: ##STR9## wherein R is alkyl containing 10 to 18 carbon atoms or mixtures thereof, M is an alkali or alkaline earth metal or transition metal, and n corresponds to the valence of M.
Claim 2
Dependent Claim
38 words
A compound of the formula: ##STR9## wherein R is alkyl containing 10 to 18 carbon atoms or mixtures thereof, M is an alkali or alkaline earth metal or transition metal, and n corresponds to the valence of M.
Claim 3
Dependent Claim
9 words
The compound of claim 1 wherein M is zinc.
Claim 4
Dependent Claim
18 words
The compound of claim 1 wherein R is alkyl of 15 to 18 carbon atoms or mixtures thereof.
Claim 5
Dependent Claim
26 words
The compound of claim 1 wherein R is alkyl having a range of from 15 to 18 carbon atoms, M is zinc and n is 2.
Claim 6
Dependent Claim
28 words
A lubricating oil composition comprising an oil of lubricating viscosity and from 0.05 to 10.0% by weight based on the composition of a compound according to claim 1.
Claim 7
Dependent Claim
10 words
The oil composition of claim 4 wherein M is zinc.
Claim 8
Dependent Claim
20 words
The oil composition of claim 4 wherein R is alkyl of from 15 to 18 carbon atoms or mixtures thereof.
Claim 9
Dependent Claim
27 words
The oil composition of claim 4 wherein R is alkyl having a range of from 15 to 18 carbon atoms, M is zinc and n is 2.
Claim 10
Dependent Claim
29 words
An oil concentrate comprising 10 to 90 weight percent of an oil of lubricating viscosity and from 90 to 10 weight percent of a compound according to claim 1.
References Cited (Backward Citations)
US2410650A
Cited
US2506570A
Cited
US2480673A
Cited
US2540084A
Cited
US3515712A
Cited
US3327024A
Cited
US3428662A
Cited
US3489682A
Cited
US3687848A
Cited
US4010107A
Cited
US4113634A
Cited
US4085053A
Cited
US4443360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-08 | 1991-09-07 | 1992-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-08 | 1995-09-07 | 1996-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-08 | 1999-09-07 | 2000-03-08 | $7700.00 | Window Closed / Lapsed |