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Patent US2694685A successfully refreshed from Google Patents.
US2694685A
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Maleinoid-vinyl copolymer and its use in lubricants
Assignee: Standard Oil Development Co
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Filing: 1952-08-11
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Granted: 1954-11-16
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Expires: 1972-08-11
Abstract
No abstract record available.
Inventors
- 👤 Jeffrey H Bartlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:32
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/192; C10L1/195; C10L1/196; C10L1/1966; C08; C08F; C08F222/00; C08F222/10; C08F222/12; C08F222/14; C08F222/145; C10M; C10M145/00; C10M145/02; C10M145/10; C10M145/16; C10M159/00; C10M159/005; C10M2203/00; C10M2203/06; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2205/00; C10M2205/22; C10M2207/00; C10M2207/28; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/086; C10M2213/00; C10M2213/04; C10M2213/06; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/026; C10M2217/04; C10M2221/00; C10M2221/02; C10N; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/08; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF A LUBRICATING OIL AND A SMALL AMOUNT, SUFFICIENT TO DEPRESS THE POUR POINT THEREOF, OF AN OIL-SOLUBLE COPOLYMER OF A VINYL ESTER OF A FATTY ACID HAVING FROM 2 TO 18 CARBON ATOMS AND A DIALKYL MALEATE WHEREIN EACH ALKYL GROUP RANGES FORM NOT LESS THAN 10 TO NOT MORE THAN 18 CARBON ATOMS.
Claim 2
Dependent Claim
63 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF A LUBRICATING OIL AND A SMALL AMOUNT, SUFFICIENT TO DEPRESS THE POUR POINT THEREOF, OF AN OIL-SOLUBLE COPOLYMER OF A VINYL ESTER OF A FATTY ACID HAVING FROM 2 TO 18 CARBON ATOMS AND A DIALKYL MALEATE WHEREIN EACH ALKYL GROUP RANGES FORM NOT LESS THAN 10 TO NOT MORE THAN 18 CARBON ATOMS.
References Cited (Backward Citations)
US2628198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |