US3030303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil composition
Assignee: Shell USA Inc
•
Filing: 1957-04-09
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Granted: 1962-04-17
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Expires: 1977-04-09
Abstract
No abstract record available.
Inventors
- 👤 Julian G Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:45
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08F; C08F20/00; C08F20/02; C08F20/08; C10M2203/00; C10M2203/10; C10M2203/108; C10M2205/00; C10M2205/22; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/024; C10M2217/026; C10M2217/028; C10M2217/04; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/06; C10M2223/061; C10M2223/063; C10M2223/065; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/05; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/135
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A LUBRICATING OIL COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR AMOUNT OF MINERAL LUBRICATING OIL AND FROM ABOUT 0.1% TO ABOUT 10% OF AN OIL-SOLUBLE COPOLYMER SELECTED FROM THE GROUP CONSISTING OF (1) A COPOLYMER OF A C12-20 ALKYL METHACRYLATE AND A VINYLPYRIDINE IN THE MOL RATIO OF 1:1 TO 7:1, RESPECTIVELY, AND (2) A C12-20 ALKYL METHACRYLATE AND A VINYLPYRROLIDINE IN THE MOL RATIO OF 1:1 TO 7:1, RESPECTIVELY, THE COPOLYMER HAVING A MOLECULAR WEIGHT OF FROM 50,000 TO 2,000,000 AND A MINOR BUT LOAD CARRYING AND STABILIZING AMOUNT OF AN OILSOLUBLE DIVALENT METAL SALT OF A DIALKYL DITHIOCARBAMIC ACID, THE DIVALENT METAL BEING SELECTED FROM THE GROUP CONSISTING OF ZINC AND CADMIUM.
Claim 2
Dependent Claim
113 words
A LUBRICATING OIL COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR AMOUNT OF MINERAL LUBRICATING OIL AND FROM ABOUT 0.1% TO ABOUT 10% OF AN OIL-SOLUBLE COPOLYMER SELECTED FROM THE GROUP CONSISTING OF (1) A COPOLYMER OF A C12-20 ALKYL METHACRYLATE AND A VINYLPYRIDINE IN THE MOL RATIO OF 1:1 TO 7:1, RESPECTIVELY, AND (2) A C12-20 ALKYL METHACRYLATE AND A VINYLPYRROLIDINE IN THE MOL RATIO OF 1:1 TO 7:1, RESPECTIVELY, THE COPOLYMER HAVING A MOLECULAR WEIGHT OF FROM 50,000 TO 2,000,000 AND A MINOR BUT LOAD CARRYING AND STABILIZING AMOUNT OF AN OILSOLUBLE DIVALENT METAL SALT OF A DIALKYL DITHIOCARBAMIC ACID, THE DIVALENT METAL BEING SELECTED FROM THE GROUP CONSISTING OF ZINC AND CADMIUM.
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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) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |