US3185643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation resistant lubricants
Assignee: California Research LLC
•
Filing: 1962-09-28
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Granted: 1965-05-25
•
Expires: 1982-09-28
Abstract
No abstract record available.
Inventors
- 👤 Lowe Warren
- 👤 Frank A Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:14
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/40; C07D207/404; C07D207/408; C07D207/412; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C10; C10M; C10M133/00; C10M133/52; C10M133/56; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M137/105; C10M141/00; C10M141/10; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/10; C10M2207/24; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; C10M2209/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/047; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/043; C10M2229/044; C10M2229/045; C10M2229/046; C10M2229/047; C10M2229/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF AN OIL OF LUBRICATING VISCOSITY AND FROM 0.1% TO 40% BY WEIGHT, OF A PRODUCT OBTAINED BY (1) REACTING AN ALKENYL SUCCINIC ANHYDRIDE HAVING FROM 50 TO 200 CARBON ATOMS IN THE ALKENYL RADICAL WITH A POLYALKYLENE POLYAMINE OF THE FORMULA
Claim 2
Dependent Claim
50 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF AN OIL OF LUBRICATING VISCOSITY AND FROM 0.1% TO 40% BY WEIGHT, OF A PRODUCT OBTAINED BY (1) REACTING AN ALKENYL SUCCINIC ANHYDRIDE HAVING FROM 50 TO 200 CARBON ATOMS IN THE ALKENYL RADICAL WITH A POLYALKYLENE POLYAMINE OF THE FORMULA
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) | 1968-05-24 | 1968-11-23 | 1969-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-24 | 1972-11-23 | 1973-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-24 | 1976-11-23 | 1977-05-25 | $7700.00 | Window Closed / Lapsed |