Patent US2543964A successfully refreshed from Google Patents.
US2543964A
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US
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Mineral oil compositions containing copolymers of olefins and esters of alpha, beta-unsaturated polybasic acids
Assignee: ExxonMobil Oil Corp
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Filing: 1947-07-09
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Granted: 1951-03-06
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Expires: 1967-07-09
Abstract
No abstract record available.
Inventors
- 👤 John J Giammaria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:33
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/086; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A LUBRICANT COMPOSITON COMPRISING A MAJOR PROPORTION OF A LUBRICATING OIL AND A MINOR PROPORTION, SUFFICIENT TO SUBSTANTIALLY LOWER THE POUR POINT THEREOF, OF A COPOLYMER FORMED BY REACTING AN ALIPHATIC MONO-OLEFIN HYDROCARBON HAVING THE DOUBLE BOND IN THE ALPHA POSITION AND HAVING THE TO ABOUT 30 CARBON ATOMS AND AN ALKYL DIESTER OF AN ALPHA, BETA-UNSATURATED DICARBOXYLIC ACID IN WHICH THE ESTER RADICALS ARE STRAIGHT-CHAIN AND CONTAIN AT LEAST 14 CARBON ATOMS PER RADICAL, IN THE THAN ABOUT 20 CARBON ATOMS PER RADICAL, IN THE PROPORTIONS OF 1 MOL OF THE OLEFIN TO FROM ABOUT 0.1 TO ABOUT 5 MOLS OF THE DIESTER, AT A TEMPERATURE BETWEEN ABOUT 75* F. AND ABOUT 200* F. FOR A PERIOD OF TIME BETWEEN ABOUT FIFTEEN MINUTES AND ABOUT TWENTY HOURS AND IN THE PRESENCE OF A PEROXIDE POLYMERIZATION CATALYST.
Claim 2
Dependent Claim
137 words
A LUBRICANT COMPOSITON COMPRISING A MAJOR PROPORTION OF A LUBRICATING OIL AND A MINOR PROPORTION, SUFFICIENT TO SUBSTANTIALLY LOWER THE POUR POINT THEREOF, OF A COPOLYMER FORMED BY REACTING AN ALIPHATIC MONO-OLEFIN HYDROCARBON HAVING THE DOUBLE BOND IN THE ALPHA POSITION AND HAVING THE TO ABOUT 30 CARBON ATOMS AND AN ALKYL DIESTER OF AN ALPHA, BETA-UNSATURATED DICARBOXYLIC ACID IN WHICH THE ESTER RADICALS ARE STRAIGHT-CHAIN AND CONTAIN AT LEAST 14 CARBON ATOMS PER RADICAL, IN THE THAN ABOUT 20 CARBON ATOMS PER RADICAL, IN THE PROPORTIONS OF 1 MOL OF THE OLEFIN TO FROM ABOUT 0.1 TO ABOUT 5 MOLS OF THE DIESTER, AT A TEMPERATURE BETWEEN ABOUT 75* F. AND ABOUT 200* F. FOR A PERIOD OF TIME BETWEEN ABOUT FIFTEEN MINUTES AND ABOUT TWENTY HOURS AND IN THE PRESENCE OF A PEROXIDE POLYMERIZATION CATALYST.
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) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |