Patent US3766150A successfully refreshed from Google Patents.
US3766150A
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Additives for lubricants
Assignee: Phillips Petroleum Co
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Filing: 1971-07-19
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Granted: 1973-10-16
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Expires: 1991-07-19
Abstract
Abstract SUPERIOR ADDITIVES FOR LUBRICANTS ARE PROVIDED BY A PROCESS COMPRISING REACTING A PETROLEUM SULFONIC ACID WITH A POLYMER OF A POLYMERIZABLE HETROCYCLIC NITROGEN BASE, E.G., A VINYLPYRIDINE, AND/OR A POLYMER OF A 1,2-ALKYLENE IMINE. LUBRICATING OIL COMPOSITIONS CONTAINING SAID ADDITIVES ARE ALSO PROVIDED.
Inventors
- 👤 S Schiff
- 👤 G Kahle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:51
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08F; C08F8/00; C10M2203/00; C10M2203/10; C10M2203/108; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2219/00; C10M2219/04; C10M2219/044; C10M2221/00; C10M2221/04; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10N; C10N2010/00; C10N2010/04
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |