Patent US4044032A successfully refreshed from Google Patents.
US4044032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal dialkyl dithiophosphates
Assignee: Texaco Inc
•
Filing: 1975-08-27
•
Granted: 1977-08-23
•
Expires: 1995-08-27
Abstract
Abstract Novel metal dialkyldithiophosphates prepared from oxalkylated long, straight-chain alcohols, acids and mercaptans and their incorporation in lubricating oils to enhance the lubricity and other properties thereof; and a method for operation of an automatic transmission incorporating said oils.
Inventors
- 👤 Morris A. Wiley
- 👤 Raymond C. Schlicht
- 👤 James O. Waldbillig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:14
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/1651; C10; C10M; C10M1/00; C10M1/08; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/04; C10M2217/046; C10M2217/06; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2225/00; C10M2225/02; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
68 words
An alkyl dithiophosphate represented by the formula: ##STR8## wherein R is a straight-chain aliphatic group containing from about 4 to 30 carbon atoms; R' is selected from a hydrogen, alkyl and aryl group; M is zinc; a is an integer of from about 2 to about 12; b is an integer of from about 1 to about 10; n is an integer corresponding to the valence of M.
Claim 2
Dependent Claim
68 words
An alkyl dithiophosphate represented by the formula: ##STR8## wherein R is a straight-chain aliphatic group containing from about 4 to 30 carbon atoms; R' is selected from a hydrogen, alkyl and aryl group; M is zinc; a is an integer of from about 2 to about 12; b is an integer of from about 1 to about 10; n is an integer corresponding to the valence of M.
Claim 3
Dependent Claim
20 words
A dithiophosphate according to claim 1 wherein R is a straight-chain alkyl radical of from 10 to 20 carbon atoms.
Claim 4
Dependent Claim
27 words
A dithiophosphate according to claim 1 wherein R' is hydrogen and a is the integer 2 and b is an integer of from about 1 to 10.
Claim 5
Dependent Claim
3 words
Zinc bis[di(n-stearoyloxytetraethoxyethyl) dithiophosphate].
Claim 6
Dependent Claim
3 words
Zinc bis[di(n-stearoyloxytetraethoxyethyl) dithiophosphate].
References Cited (Backward Citations)
US2177983A
Cited
US2373811A
Cited
US2727067A
Cited
US2895973A
Cited
US3166581A
Cited
US3068259A
Cited
US3029268A
Cited
US3168497A
Cited
US3337654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |