US3879306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic transmission fluid
Assignee: Texaco Inc
•
Filing: 1973-11-05
•
Granted: 1975-04-22
•
Expires: 1993-11-05
Abstract
Abstract Automatic transmission fluid composition and concentrates thereof comprising a major amount of a lubricating oil and a friction modifying amount of an N-(hydroxyalkyl) alkenyl succinamic acid or a mixture of N-(hydroxyalkyl) alkenyl succinamic acid and N-(hydroxyalkyl) alkenyl succinimide. In addition, a method of operating an automatic transmission having friction sensitive power transmitting means employing the aforedescribed automatic transmission fluid composition.
Inventors
- 👤 Mahmoud S Kablaoui
- 👤 Robert E Reid
- 👤 Arthur W Godfrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:21
CPC Classifications
C; C10; C10M; C10M133/00; C10M133/02; C10M133/16; C10M2203/00; C10M2203/10; C10M2203/102; C10M2203/108; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/086; C10M2215/12; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2227/00; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/05; C10N; C10N2010/00; C10N2010/04; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/02; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/08; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
55 words
A method for operating an automatic transmission which comprises supplying to said transmission a lubricating oil composition comprising at least about 85 wt. % of a mineral lubricating oil and between about 0.01 and 5 wt. % of a friction modifier selected from the group consisting of N-(hydroxyalkyl) alkenyl succinamic acid characterized by the formula:
Claim 2
Independent Claim
55 words
A method for operating an automatic transmission which comprises supplying to said transmission a lubricating oil composition comprising at least about 85 wt. % of a mineral lubricating oil and between about 0.01 and 5 wt. % of a friction modifier selected from the group consisting of N-(hydroxyalkyl) alkenyl succinamic acid characterized by the formula:
Claim 3
Independent Claim
52 words
A METHOD FOR OPERATING AN AUTOMATIC TRANSMISSION WHICH COMPRISES SUPPLYING TO SAID TRANSMISSION A LUBRICATING OIL COMPOSITION COMPRISING AT LEAST ABOUT 0.01 AND 5 WT. % OF A FRIC , 85 WT. % OF A MINERAL TION MODIFIER SELECTED FROM THE GROUP CONSISTING OF N(HYDROXYALKYL) ALKENYL SUCCINAMIC ACID CHARACTERIZED BY THE FORMULA:
Claim 4
Independent Claim
52 words
A METHOD FOR OPERATING AN AUTOMATIC TRANSMISSION WHICH COMPRISES SUPPLYING TO SAID TRANSMISSION A LUBRICATING OIL COMPOSITION COMPRISING AT LEAST ABOUT 0.01 AND 5 WT. % OF A FRIC , 85 WT. % OF A MINERAL TION MODIFIER SELECTED FROM THE GROUP CONSISTING OF N(HYDROXYALKYL) ALKENYL SUCCINAMIC ACID CHARACTERIZED BY THE FORMULA:
Claim 5
Dependent Claim
37 words
A method for operating an automatic transmission which comprises supplying to said transmission a lubricating composition in accordance with claim 1 wherein said friction modifier is said succinamic acid and said succinamic acid is N-(2-hydroxyethyl)-n-tetradecenyl succinamic acid.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |