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Patent US3702299A successfully refreshed from Google Patents.
US3702299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating composition
Assignee: Gulf Research and Development Co
•
Filing: 1970-11-13
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Granted: 1972-11-07
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Expires: 1990-11-13
Abstract
Abstract A MINERAL LUBRICATING OIL, PARTICULARLY A HYDROGENATED MINERAL LUBRICATING OIL IS STABILIZED AGAINST PHOTO-DETERIORATION BY INCORPORATING THEREIN A SMALL AMOUNT SUFFICIENT TO INHIBIT SUCH DETERORATION OF EACH OF (1) AN ORTHOHYDROXYBENZOPHENONE, E.G., 2,2''-DIHYDROXY-4-METHOXYBENZOPHENONE AND (2) AN ALIPHATIC PRIMARY AMINE, E.G., A C8-C18 ALKYL AMINE OR MIXTURE OF C8-C18 ALKYL AMINES.
Inventors
- 👤 Robert J Hartle
- 👤 Joseph J Mcgrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:53
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/04; C10M2207/046; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |