Patent US3624603A successfully refreshed from Google Patents.
US3697428A
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Additives for lubricants and fuels
Assignee: Lubrizol Corp
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Filing: 1971-11-01
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Granted: 1972-10-10
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Expires: 1991-11-01
Abstract
Abstract OIL-SOLUBLE COMPOSITIONS PRODUCED BY REACTING POLYCARBOXYLIC ACID ACYLATING AGENTS HAVING AT LEAST FIFTY ALIPHATIC CARBON ATOMS WITH A DI- OR TRIHYDRIC ALCOHOL AND A POLYHYDRIC ALCOHOL HAVING AT LEAST FOUR HYDROXYL GROUPS ARE USEFUL AS ASHLESS DISPERSANTS IN LUBRICANTS AND FUELS. POLYOLEFIN-SUBSTITUTED SUCCINIC ANHYDRIDE SIMULTANEOUSLY TREATED WITH A MIXTURE OF TRISMETHYLOLPROPANE AND PENTAERYTHRITOL PRODUCES SUCH AN OIL-SOLUBLE COMPOSITION.
Inventors
- 👤 Norman A Meinhardt
- 👤 Robert Widmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:05
CPC Classifications
C; C10; C10M; C10M133/00; C10M133/52; C10M133/54; C08; C08F; C08F8/00; C08F8/14; C08G; C08G63/00; C08G63/02; C08G63/12; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/1817; C10L1/22; C10L1/221; C10M129/00; C10M129/86; C10M129/95; C08F2810/00; C08F2810/20; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2207/028; C10M2207/28; C10M2207/282; C10M2207/283; C10M2207/287; C10M2207/289; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/10; C10M2209/102; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/109; C10M2209/11; C10M2209/111; C10M2209/12; C10M2211/00; C10M2211/04; C10M2211/044; C10M2211/06; C10M2211/08; C10M2213/00; C10M2213/02; C10M2213/04; C10M2213/06; C10M2213/062; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/08; C10M2215/082; C10M2215/20; C10M2215/202; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/10; C10M2221/00; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2223/06; C10M2223/065; C10M2223/12; C10M2223/121; C10M2225/00; C10M2225/04; C10M2225/041; C10M2227/00; C10M2227/02; C10M2227/04; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/042; C10M2229/045; C10M2229/046; C10M2229/047; C10M2229/048; C10N; C10N2010/00; C10N2010/04; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/08; C10N2040/20; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28; 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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |