Patent US3657397A successfully refreshed from Google Patents.
US3657397A
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Trialkyl phosphite-long chain alkenyl hydrocarbon-substituted succinic anhydride reaction products
Assignee: Standard Oil Co
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Filing: 1969-05-08
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Granted: 1972-04-18
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Expires: 1989-05-08
Abstract
Abstract TRIALKYL PHOSPHITIES, E.G. TRIBUTYL PHOSPHIETE, ARE REACTED WITH ALKENYL HYDROCARBON-SUBSTITUTED SUCCINIC ANHYDRIDES, IN WHICH THE ALKENYL HYDROCARBON CONTAINS AT LEAST 30 CARBON ATOMS, TO OBTAIN REACTION PRODUCTS WHICH ARE USEFUL AS ADDITIVES IN HYDROCARBON FUELS AND IN LUBRICATING OILS.
Inventors
- 👤 William T Brannen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:26
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/123; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/26; C10L1/2691; C10M137/00; C10M137/12; C10M2223/00; C10M2223/06; C10M2223/065; C10N; 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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |