Patent US2718501A successfully refreshed from Google Patents.
US2718501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oils stable against oxidation
Assignee: California Research LLC
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Filing: 1952-03-01
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Granted: 1955-09-20
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Expires: 1972-03-01
Abstract
No abstract record available.
Inventors
- 👤 Oliver L Harle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:44
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/20; C10M135/22; C11; C11B; C11B5/00; C11B5/0092; C10M2203/00; C10M2203/06; C10M2203/10; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/024; C10M2205/026; C10M2205/028; C10M2205/14; C10M2205/17; C10M2205/173; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; C10M2209/108; C10M2209/109; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/065; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2219/00; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/084; C10M2219/085; C10M2219/10; C10M2219/104; C10M2219/108; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/045; C10M2229/046; C10M2229/047; C10M2229/048; C10M2229/05; C10N; C10N2010/00; C10N2010/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
AN OIL COMPOSITION HAVING IMPROVED STABILITY TOWARD OXIDATION, SAID COMPOSITION COMPRISING A MAJOR PROPORTION OF A NORMALLY OXIDIZABLE OIL TOGETHER WITH A TOTAL OF FROM ABOUT 0.1 TO 2 PER CENT BY WEIGHT OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC HYDROCARBON MERCAPTANS, ALIPHATIC HYDROCARBON SULFIDES AND ALIPHATIC HYDROCARBON POLYSULFIDES, SAID COMPOUNDS EACH HAVING A MOLECULAR WEIGHT OF AT LEAST 150, AND A TOTAL OF FROM 0.03 TO 0.5 PER CENT BY WEIGHT OF AT LEAST ONE AROMATIC AMINE SELECTED FROM THE GROUP CONSISTING OF PHENYL-A-NAPTHYLAMINE, A-NAPHTHYLAMINE, DIPHENYLAMINE, P-HYDROXY DIPHENYLAMINE, CARBAZOLE, DI-BNAPHTHYL-P-PHENYL DIAMINE AND PHENOTHIAZINE.
Claim 2
Dependent Claim
99 words
AN OIL COMPOSITION HAVING IMPROVED STABILITY TOWARD OXIDATION, SAID COMPOSITION COMPRISING A MAJOR PROPORTION OF A NORMALLY OXIDIZABLE OIL TOGETHER WITH A TOTAL OF FROM ABOUT 0.1 TO 2 PER CENT BY WEIGHT OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC HYDROCARBON MERCAPTANS, ALIPHATIC HYDROCARBON SULFIDES AND ALIPHATIC HYDROCARBON POLYSULFIDES, SAID COMPOUNDS EACH HAVING A MOLECULAR WEIGHT OF AT LEAST 150, AND A TOTAL OF FROM 0.03 TO 0.5 PER CENT BY WEIGHT OF AT LEAST ONE AROMATIC AMINE SELECTED FROM THE GROUP CONSISTING OF PHENYL-A-NAPTHYLAMINE, A-NAPHTHYLAMINE, DIPHENYLAMINE, P-HYDROXY DIPHENYLAMINE, CARBAZOLE, DI-BNAPHTHYL-P-PHENYL DIAMINE AND PHENOTHIAZINE.
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) | 1958-09-19 | 1959-03-21 | 1959-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-19 | 1963-03-21 | 1963-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-19 | 1967-03-21 | 1967-09-20 | $7700.00 | Window Closed / Lapsed |