US3813336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of amines and dithiophosphoric acids or salts
Assignee: Chevron USA Inc
•
Filing: 1970-09-11
•
Granted: 1974-05-28
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Expires: 1990-09-11
Abstract
Abstract NOVEL COMPOSITIONS USEFUL AS LUBRICATING OIL ADDITIVES ARE PRODUCED BY REACTING AN AMINE AND A DITHIOPHOSPHORIC ACID OR SALT AT A TEMPERATURE OF 140*-200* C.
Inventors
- 👤 A Goldschmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:10
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/10; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/047; C10N; C10N2010/00; C10N2010/04; C10N2070/00; C10N2070/02
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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |