Patent US3791971A successfully refreshed from Google Patents.
US3791971A
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Lubricating oil compositions
Assignee: Chevron USA Inc
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Filing: 1972-01-05
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Granted: 1974-02-12
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Expires: 1992-01-05
Abstract
Abstract POLYOXYALKYLENE GLYCOLS AND THEIR REACTION PRODUCTS WITH ORGANIC DIISOCYANATE AND DICARBOXYLIC ACID ARE COMBINED WITH ALKALINE EARTH METAL CARBONATES DISPERSED IN A HYDROCARBON MEDIUM TO PROVIDE LYBRICATING COMPOSITIONS OF SUPERIOR ACID NEUTRALIZATION CAPABILITY AND RUST INHIBITION IN INTERNAL COMBUSTION ENGINES.
Inventors
- 👤 W Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:13
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/20; C10M2201/00; C10M2201/06; C10M2201/062; C10M2203/00; C10M2203/10; C10M2203/102; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/027; C10M2207/028; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/107; C10M2209/109; C10M2209/11; C10M2209/111; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/086; C10M2215/10; C10M2215/22; C10M2215/223; C10M2215/224; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/04; C10M2217/042; C10M2217/043; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/047; C10M2223/06; C10M2223/065; C10N; C10N2010/00; C10N2010/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
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 |