US3778454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Complex ester
Assignee: Ethyl Corp
•
Filing: 1970-02-18
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Granted: 1973-12-11
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Expires: 1990-02-18
Abstract
Abstract A COMPLEX ESTER LUBRICANT IS MADE BY REACTING A MOLE OF TRIMETHYLOLPROPANE WITH 0.1-0.3 MOLE OF A C4-10 ALIPHATIC DICARBOXYLIC ACID AND ESTERIFYING THE REMAINING HYDROXYL GROUPS WITH C4-12 ALIPHATIC MONOCARBOXYLIC ACIDS HAVING AN AVERAGE CARBON CHAIN OF ABOUT 5-9 CARBON ATOMS. THE ESTERS HAVE VERY LOW POUR POINTS AND HIGH VISOCITYS INDEXES. CERTAIN OF THE ESTERS HAVE PHYSICAL PROPERTIES MEETING NAVY MIL-L-23699-B AND AIR FORCE MILL-27502 SPECIFICATIONS FOR ESTERS USED IN JET AIRCRAFT ENGINES.
Inventors
- 👤 J Kleinman
- 👤 L Plonsker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:45
CPC Classifications
C; C10; C10M; C10M3/00; C07; C07C; C07C69/00; C07C69/02; C07C69/22; C07C69/30; C07C69/34; C07C69/40; C07C69/42; C07C69/44; C07C69/46; C07C69/48; C07C69/50; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/025; C10M2207/026; C10M2207/28; C10M2207/284; C10M2207/285; C10M2207/30; C10M2209/00; C10M2209/02; C10M2209/10; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/044; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/10; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/224; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/10; C10M2219/104; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2223/06; C10M2223/065; C10M2225/00; C10M2225/04; C10M2225/041; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/05; C10M2229/052; C10N; C10N2010/00; C10N2010/04; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/08; C10N2040/12; C10N2040/13; C10N2040/135
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |