US3756951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ant compositons containing same phosphorus derivatives of 4,4'-disuccin imidobiphenyloxide and lubric
Assignee: Mobil Oil AS
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Filing: 1971-08-30
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Granted: 1973-09-04
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Expires: 1991-08-30
Abstract
Abstract HEREIN ARE DISCLOSED PHOSPHORUS DERIVATIVES OF 4,4''-DISUCCINIMIDOBIPHENYLS OR 4,4''-DISUCCINIMIDOBIPHENYLOXIDES AND LUBRICANT COMPOSITIONS CONTAINING SAME. SAID PHOSPHORUS DERIVATIVES HAVING THE STRUCTUREAL FORMULA: (O)N-(R"-1,4-PHENYLENE)-(2,5-DI(O=)PYRROLIDIN-1,3-YLENE)- X-P(=X)(-R)-R'' WHEREIN R AND R'' ARE INDIVIDUALLY SELECTED FROM THE GROUP CONSISTING OF HYDROCARBYL AND HYDROCARBOYLOXY, R" IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, R AND R1, N IS 0 OR 1 AND X IS OXYGEN OR SULFUR.
Inventors
- 👤 J Dickert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:23
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/553; C07F9/5537; C10; C10M; C10M137/00; C10M137/12; C10M137/14; C10M2205/00; C10M2207/00; C10M2207/04; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2209/00; C10M2209/02; C10M2209/10; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/047; C10M2223/06; C10M2223/061; C10M2223/065; C10M2229/00; C10M2229/02; C10M2229/04; 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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |