Patent US3630897A successfully refreshed from Google Patents.
US3630897A
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Color stabilization of lubricating compositions
Assignee: Phillips Petroleum Co
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Filing: 1969-10-06
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Granted: 1971-12-28
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Expires: 1989-10-06
Abstract
Abstract THE DARKENING AND DISCOLORATION OF LUBRICATING GREASES AND OILS INDUCED BY THE USE OF METAL SALTS OF SUBSTITUTED DITHIOCARBAMIC ACID ARE EFFECTIVELY PREVENTED BY THE INCLUSION OF SMALL AMOUNTS OF POLY(PHENYLENE SULFIDE) IN THE LUBRICATING COMPOSITON.
Inventors
- 👤 Raymond Rohde
- 👤 Andrew E Skeen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:57
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2201/00; C10M2201/10; C10M2201/105; C10M2205/00; C10M2205/14; C10M2205/16; C10M2205/17; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2219/00; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2221/00; C10M2221/02; C10M2221/04; C10M2221/041; C10M2223/00; C10M2223/06; C10M2223/065; C10M2227/00; C10M2227/04; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/10; C10N2010/12; C10N2010/14; C10N2010/16; C10N2040/00; C10N2040/02; C10N2040/20; C10N2040/22; C10N2050/00; C10N2050/10
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |