Patent US3156649A successfully refreshed from Google Patents.
US3156649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Functional fluids containing thiocarboxylate esters
Assignee: Shell USA Inc
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Filing: 1960-04-25
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Granted: 1964-11-10
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Expires: 1980-04-25
Abstract
No abstract record available.
Inventors
- 👤 William A Hewett
- 👤 George M Calhoun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:39
CPC Classifications
C; C10; C10M; C10M151/00; C08; C08C; C08C19/00; C08C19/20; C08F; C08F210/00; C08F236/00; C08F236/02; C08F236/04; C08F8/00; C08F8/34; C08F2800/00; C08F2800/10; C10M2203/00; C10M2203/06; C10M2203/10; C10M2205/00; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/023; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/289; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/107; C10M2219/00; C10M2219/06; C10M2219/08; C10M2219/082; C10M2221/00; C10M2221/04; C10M2221/041; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2040/00; C10N2040/08; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
50 words
A MINERAL OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF MINERAL OIL AND FROM ABOUT 0.1% TO ABOUT 5% OF A POLYTHIOACETATE DERIVATIVE OF A COPOLYMER OF A DIOLEFIN HAVING FROM ABOUT FOUR THROUGH SIX CARBON ATOMS AND AN ALPHA-MONOOLEFIN WHEREIN THE COPOLYMER HAS A MOLECULAR WEIGHT OF AT LEAST 5,000.
Claim 2
Dependent Claim
50 words
A MINERAL OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF MINERAL OIL AND FROM ABOUT 0.1% TO ABOUT 5% OF A POLYTHIOACETATE DERIVATIVE OF A COPOLYMER OF A DIOLEFIN HAVING FROM ABOUT FOUR THROUGH SIX CARBON ATOMS AND AN ALPHA-MONOOLEFIN WHEREIN THE COPOLYMER HAS A MOLECULAR WEIGHT OF AT LEAST 5,000.
Claim 3
Dependent Claim
39 words
A MINERAL OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF MINERAL OIL AND FROM ABOUT 0.1% TO 5% OF AN OIL-SOLUBLE POLYTHIOACETATIVE DERIVATIVE OF A COPOLYMER OF BUTADIENE AND 1-OCTADECENE WHEREIN THE COPOLYMER HAS A MOLECULAR WEIGHT OF ABOUT 400,000.
Claim 4
Dependent Claim
39 words
A MINERAL OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF MINERAL OIL AND FROM ABOUT 0.1% TO 5% OF AN OIL-SOLUBLE POLYTHIOACETATIVE DERIVATIVE OF A COPOLYMER OF BUTADIENE AND 1-OCTADECENE WHEREIN THE COPOLYMER HAS A MOLECULAR WEIGHT OF ABOUT 400,000.
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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) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |