US3215632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating compositions
Assignee: Shell USA Inc
•
Filing: 1962-06-22
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Granted: 1965-11-02
•
Expires: 1982-06-22
Abstract
No abstract record available.
Inventors
- 👤 Hughes Robert Ivor
- 👤 Frederick M Fowkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:33
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/40; C07D207/404; C07D207/408; C07D207/412; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C10; C10M; C10M157/00; C10M157/04; C10M161/00; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/06; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/04; C10M2207/046; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/086; C10M2209/10; C10M2209/103; C10M2209/104; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/06; C10M2215/062; C10M2215/086; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/028; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084; C10M2219/087; C10M2219/088; C10M2219/089; C10M2221/00; C10M2221/02; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/047; C10M2223/06; C10M2223/065; C10M2223/12; C10M2225/00; C10M2225/02; C10M2225/04; C10M2227/00; C10M2227/02; C10M2227/04; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/043; C10M2229/044; C10M2229/045; C10M2229/046; C10M2229/047; C10M2229/048; C10M2229/05; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A MINERAL LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF MINERAL LUBRICATING OIL AND FROM ABOUT 1.2 TO ABOUT 5% BY WEIGHT EACH OF (A) AN OILSOLUBLE COPOLYMER OF A C-VINYL PYRRIDINE AND A MIXTURE OF ESTERS OF AN ACRYLIC ACID AND LONG CHAIN ALIPHATIC HYDROCARBON ALCOHOL HAVING FROM 8 TO 18 CARBON ATOMS, AND AN ESTER OF AN ACRYLIC ACID AND A LOWER ALKANOL HAVING FROM 1 TO 4 CARBON ATOMS, SAID COPOLYMER HAVING CVINYLPYRIDINE AND THE TOTAL ESTER MIXTURE IN A MOLE RATIO OF ABOUT 1:20 WITH THE LOWER ALKYL ESTER MAKING UP FROM 10 TO 45 MOL PERCENT OF THE TOTAL ESTER MIXTURE, AND THE SAID COPOLYMER HAVING AN AVERAGE MOLECULAR WEIGHT FROM 5X10**4 TO 2.5X10**6 AND (B) AN OIL-SOLUBLE COPOLYMER OF C8-20 ALKYL FUMARATE, VINYL ACETATE AND MALEIC ANHYDRIDE, THE C8-20 ALKYL FUMARATE COMPRISING 80-40% AND THE BALANCE OF THE MIXTURE OF 20-60% BEING THE VINYL ACETATE AND MALEIC ANHDRIDE, HAVING A MOLECULAR WEIGHT OF FROM 50,000 TO 500,000 THE RATIO OF (A) TO (B) BEING 1:1 TO 1:4 RESPECTIVELY.
Claim 2
Dependent Claim
174 words
A MINERAL LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF MINERAL LUBRICATING OIL AND FROM ABOUT 1.2 TO ABOUT 5% BY WEIGHT EACH OF (A) AN OILSOLUBLE COPOLYMER OF A C-VINYL PYRRIDINE AND A MIXTURE OF ESTERS OF AN ACRYLIC ACID AND LONG CHAIN ALIPHATIC HYDROCARBON ALCOHOL HAVING FROM 8 TO 18 CARBON ATOMS, AND AN ESTER OF AN ACRYLIC ACID AND A LOWER ALKANOL HAVING FROM 1 TO 4 CARBON ATOMS, SAID COPOLYMER HAVING CVINYLPYRIDINE AND THE TOTAL ESTER MIXTURE IN A MOLE RATIO OF ABOUT 1:20 WITH THE LOWER ALKYL ESTER MAKING UP FROM 10 TO 45 MOL PERCENT OF THE TOTAL ESTER MIXTURE, AND THE SAID COPOLYMER HAVING AN AVERAGE MOLECULAR WEIGHT FROM 5X10**4 TO 2.5X10**6 AND (B) AN OIL-SOLUBLE COPOLYMER OF C8-20 ALKYL FUMARATE, VINYL ACETATE AND MALEIC ANHYDRIDE, THE C8-20 ALKYL FUMARATE COMPRISING 80-40% AND THE BALANCE OF THE MIXTURE OF 20-60% BEING THE VINYL ACETATE AND MALEIC ANHDRIDE, HAVING A MOLECULAR WEIGHT OF FROM 50,000 TO 500,000 THE RATIO OF (A) TO (B) BEING 1:1 TO 1:4 RESPECTIVELY.
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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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |