Patent US3822982A successfully refreshed from Google Patents.
US3100749A
Expired / Lapsed
US
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Lubricating compositions
Assignee: Shell USA Inc
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Filing: 1960-05-16
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Granted: 1963-08-13
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Expires: 1980-05-16
Abstract
No abstract record available.
Inventors
- 👤 Wittner Eugene
- 👤 Rozalsky Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:17
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/40; C10M2207/402; C10M2207/404; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/06; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/047; C10M2223/06; C10M2223/061; C10M2223/12; C10M2225/00; C10M2225/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
AN IMPROVED CORROSION RESISTANT AND DETERGENT HYDROCARBON LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF HYDROCARBON LUBRICATING OIL AND FROM 2% TO 10% BY WEIGHT TOTAL OF A COPOLYMER MIXTURE OF (A) AND (B) OF WHICH COPOLYMER (A) COMPRISES 10-75% BY WEIGHT OF THE TOTAL POLYMER MIXTURE AND COPOLYMER (A) IS A COPOLYMER OF A MIXTURE OF 20-30% BY WEIGHT OF A VINYLPYRIDINE AND 80-70% BY WEIGHT OF A C10-20 ALKYL METH ACRYLATE HAVING A MOLECULAR WEIGHT OF 50,000 TO 300,000 AND A NITROGEN CONTENT OF FROM 2.5% TO 3.5% AND (B) IS A COPOLYMER OF A VINYLPYRIDINE AND A MIXTURE OF TWO DISSIMILAR ACRYLATES ONE BEING A C10-20 ALKYLACRYLATE AND THE OTHER BEING A C1-4 ALKYL METHACRYLATE WHICH CONSTITUTES 10-30% BY WEIGHT OF THE TOTAL ACRYLATE MIXTURE, THE COPOLYMER HAVING A MOLECULAR WEIGHT OF FROM 400,000 TO 800,000 AND A NITROGEN CONTENT OF FROM 0.3 TO 1%.
Claim 2
Dependent Claim
148 words
AN IMPROVED CORROSION RESISTANT AND DETERGENT HYDROCARBON LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF HYDROCARBON LUBRICATING OIL AND FROM 2% TO 10% BY WEIGHT TOTAL OF A COPOLYMER MIXTURE OF (A) AND (B) OF WHICH COPOLYMER (A) COMPRISES 10-75% BY WEIGHT OF THE TOTAL POLYMER MIXTURE AND COPOLYMER (A) IS A COPOLYMER OF A MIXTURE OF 20-30% BY WEIGHT OF A VINYLPYRIDINE AND 80-70% BY WEIGHT OF A C10-20 ALKYL METH ACRYLATE HAVING A MOLECULAR WEIGHT OF 50,000 TO 300,000 AND A NITROGEN CONTENT OF FROM 2.5% TO 3.5% AND (B) IS A COPOLYMER OF A VINYLPYRIDINE AND A MIXTURE OF TWO DISSIMILAR ACRYLATES ONE BEING A C10-20 ALKYLACRYLATE AND THE OTHER BEING A C1-4 ALKYL METHACRYLATE WHICH CONSTITUTES 10-30% BY WEIGHT OF THE TOTAL ACRYLATE MIXTURE, THE COPOLYMER HAVING A MOLECULAR WEIGHT OF FROM 400,000 TO 800,000 AND A NITROGEN CONTENT OF FROM 0.3 TO 1%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |