US3769216A
Expired / Lapsed
US
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Nitrogenous ethylene/propylene copolymers and lubricants containing them
Assignee: Chevron USA Inc
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Filing: 1971-02-26
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Granted: 1973-10-30
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Expires: 1991-02-26
Abstract
Abstract NOVEL POLYMERS PRODUCED BY REACTING A PRIMARY OR SECONDARY AMINE AND MECHANICALLY DEGRADED, OXIDIZED ATACTIC ETHYLENE/PROPYLENE COPOLYMER. ALSO DISCLOSED ARE AUTOMOTIVE LUBRICATING OILS CONTAINING SUCH POLYMERS AS ANTIVARNISH ADDITIVES.
Inventors
- 👤 C Gordon
- 👤 D Wilgus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:22
CPC Classifications
C; C10; C10M; C10M143/00; C10M143/18; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C10M2203/00; C10M2203/06; C10M2203/10; C10M2203/102; C10M2205/00; C10M2205/02; C10M2207/00; C10M2207/04; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/086; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/04; C10M2219/044; C10M2219/046; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/04; C10N2070/00; C10N2070/02
Claims Analysis
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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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |