US3761405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti oxidants
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1972-03-24
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Granted: 1973-09-25
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Expires: 1992-03-24
Abstract
Abstract A NON-CORROSIVE ANTIOXIDANT MIXUTRE SUITABLE FOR ADDITION TO AN AIRCRAFT LUBRICATING OIL COMPRISING (A) TWO TO TEN PARTS BY WEIGHT OF A COMPOUND OF THE FORMULA (((R)N-PHENYL)-NH-)NAPHTHALENE WHERE N IS AN INTEGER, AND R IS AN ALKYL GROUP CONTAINING AT LEAST THREE CARBON ATOMS (E.G. OCTYL PHENYL-B-NAPHTHYLAMINE), AND (B) ONE PART BY WEIGHT OF A PHENYLENE DIAMINE OF THE FORMULA (4-(X1-NH-)PHENYL)-NH-X2, OR 1-(X1-NH-),2-(X2-NH-)BENZENE WHERE X1 AND X2 ARE HYDROCARBYL GROUP OR THE GROUP R1COOR4- WHERE R1 AND R4 ARE HYDROCARBYL GROUPS (E.G. N-PHENYL, N1-CYCLOHEXYL-P-PHENYLENE DIAMINE).
Inventors
- 👤 G Jervis
- 👤 R Robson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:28
CPC Classifications
C; C10; C10M; C10M133/00; C10M133/02; C10M133/04; C10M133/12; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/025; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/30; C10M2207/302; C10M2207/304; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/107; C10M2209/108; C10M2209/109; C10M2209/11; C10M2209/111; C10M2209/112; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/066; C10M2215/08; C10M2215/082; C10M2215/24; C10M2215/28; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/06; C10M2223/065; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/05
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |