US2892784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation resistant lubricant compositions
Assignee: California Research LLC
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Filing: 1955-06-29
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Granted: 1959-06-30
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Expires: 1975-06-29
Abstract
No abstract record available.
Inventors
- 👤 Oliver L Harle
- 👤 John R Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:54
CPC Classifications
C; C10; C10M; C10M161/00; C10M2203/00; C10M2203/10; C10M2205/00; C10M2205/14; C10M2205/16; C10M2205/17; C10M2205/22; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/108; C10M2209/109; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/067; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/10; C10M2219/104; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/045; C10M2229/046; C10M2229/047; C10M2229/048; C10N; C10N2040/00; C10N2040/08; C10N2040/135; C10N2040/14; C10N2040/16; C10N2040/17; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
A LUBRICATING OIL COMPOSITION HAVING IMPROVED RESISTANCE AGAINST OXIDATION, SAID COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF A NORMALLY OXIDIZABLE OIL OF LUBRICATING VISCONITY SELECTED FROM THE GROUP CONSISTING OF MINERAL LUBRICATING OIL AND HEXA(2-ETHYLHEXOXY) DISILOXANE, FROM ABOUT 0.1 TO ABOUT 5% BY WEIGHT OF A SECONDARY DIARYLAMINE OXIDATION INHIBITOR SELECTED FROM THE GROUP CONSISTING OF PHENYL-A-NAPHTHYLAMINE AND PHENOTHIAZINE AND FROM ABOUT 0.5 TO ABOUT 10% BY WEIGHT OF A COPOLYMER CONSISTING ESSENTIALLY OF DODECYL METHACRYLATE AND DIETHYLAMINOETHYL METHACRYLATE IN A WEIGHT RATIO OF ABOUT 6.5:1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-29 | 1962-12-29 | 1963-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-29 | 1966-12-29 | 1967-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-29 | 1970-12-29 | 1971-06-30 | $7700.00 | Window Closed / Lapsed |