Patent US3791973A successfully refreshed from Google Patents.
US3791973A
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Grease thickened with lithium soap of hydroxy fatty acid and lithium salt of aliphatic dicarboxylic acid
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1972-02-18
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Granted: 1974-02-12
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Expires: 1992-02-18
Abstract
Abstract A MULTIPURPOSE GREASE HAVING A DROPPING POINT IN EXCESS OF 5000* F. IS PREPARED BY USING AS THE GREASE THICKENER A COMBINATION OF A LITHIUM SOAP OF A C12 TO C24 HYDROXY FATTY ACID, E.G. 12-HYDROXY STEARIC ACID AND A LITHIUM SOAP OF A C2 TO C12 ALIPHATIC DICARBOXYLIC ACID, E.G., AZELAIC ACID, AND BY EMPLOYING A PARTICULAR SEQUENCE OF STEPS THAT INCLUDES THE SEPARATE FORMATION OF THE INDIVIDUAL SOAPS IN THE BASE STOCK OF THE GREASE, THE HYDROXY FATTY ACID SOAP BEING FORMED FIRST.
Inventors
- 👤 S Gilani
- 👤 D Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:13
CPC Classifications
C; C10; C10M; C10M117/00; C10M117/06; C10M117/02; C10M177/00; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/22; C10M2207/00; C10M2207/04; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/125; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/282; C10M2207/32; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/11; C10M2209/111; C10M2209/112; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2219/00; C10M2219/04; C10M2219/044; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/042; C10M2229/043; C10M2229/044; C10N; C10N2010/00; C10N2010/02; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13; C10N2050/00; C10N2050/10; C10N2070/00
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |