US3630902A
Expired / Lapsed
US
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Lubricant additives derived from catalytically polymerized reaction products of succinimides and unsaturated monocarboxylic acids or anhydrides
Assignee: Chevron USA Inc
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Filing: 1969-07-23
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Granted: 1971-12-28
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Expires: 1989-07-23
Abstract
Abstract A PROCESS IS DESCIRBED FOR THE PREPARATION OF LUBRICANT ADDITIVES HAVING DETERGENCY AND VISCOSITY INDEX-IMPROVING PROPERTIES WHEREIN A SUCCINIMIDE DETERGENT HAVING A FREE PRIMARY AMINO GROUP IS REACTED WITH A POLYMERIZABLE ACID OR ACID DERIVATIVE AND THE REACTION PRODUCT POLYMERIZED. A FURTHER POLYMERIZATION WITH A COPOLYMERIAZBLE MONOMER IS ALSO DESCRIBED.
Inventors
- 👤 Keith Coupland
- 👤 John Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:05
CPC Classifications
C; C10; C10M; C10M149/00; C10M149/02; C10M149/10; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C10M133/00; C10M133/52; C10M133/56; C10M143/00; C10M145/00; C10M145/02; C10M2205/00; C10M2205/02; C10M2209/00; C10M2209/02; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/024; C10M2217/028; C10M2217/04; C10M2217/046; C10M2217/06
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |