Patent US2886531A successfully refreshed from Google Patents.
US2886531A
Expired / Lapsed
US
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Oil phase antifreeze inhibitor
Assignee: Texaco Inc
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Filing: 1956-03-13
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Granted: 1959-05-12
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Expires: 1976-03-13
Abstract
No abstract record available.
Inventors
- 👤 Fiser William Dewey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:41
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
AN ANTIFREEZE MIXTURE COMPRISING A POLYHYDROXY ALCOHOL FREEZING POINT DEPRESSANT AND 0.5 TO 2% BY VOLUME OF AN INSOLUBLE OIL PHASE INHIBITOR COMPRSING, BY WEIGHT, 30% TO 60% MINERAL OIL, 20 TO 40% OF A METAL SALT OF PETROLEUM SULFONATE, 8 TO 18% OF A POLYVALENT SALT OF AN ALKYL THIOPHOSPHATE WHEREIN SAID ALKYL GROUP HAS 6 TO 12 CARBON ATOMS, 5 TO 12% OF A DIVALENT METAL NAPHTHENATE AND 5 TO 15% OF A FATTY ACID PARTIAL ESTER OF AN ALIPHATIC POLYOL HAVING AT LEAST 3 HYDROXYL GROUPS.
Claim 2
Dependent Claim
89 words
AN ANTIFREEZE MIXTURE COMPRISING A POLYHYDROXY ALCOHOL FREEZING POINT DEPRESSANT AND 0.5 TO 2% BY VOLUME OF AN INSOLUBLE OIL PHASE INHIBITOR COMPRSING, BY WEIGHT, 30% TO 60% MINERAL OIL, 20 TO 40% OF A METAL SALT OF PETROLEUM SULFONATE, 8 TO 18% OF A POLYVALENT SALT OF AN ALKYL THIOPHOSPHATE WHEREIN SAID ALKYL GROUP HAS 6 TO 12 CARBON ATOMS, 5 TO 12% OF A DIVALENT METAL NAPHTHENATE AND 5 TO 15% OF A FATTY ACID PARTIAL ESTER OF AN ALIPHATIC POLYOL HAVING AT LEAST 3 HYDROXYL GROUPS.
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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |