US2570846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral oil compositions containing esters of reaction product of maleic anhydride and styrene
Assignee: ExxonMobil Oil Corp
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Filing: 1947-03-20
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Granted: 1951-10-09
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Expires: 1967-03-20
Abstract
No abstract record available.
Inventors
- 👤 Ferdinand P Otto
- 👤 Orland M Reiff
- 👤 Robert W Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:40
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08F; C08F22/00; C08F22/04; C08F8/00; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/086; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A MINERALI LUBRICATING OIL CONTAINING A MINOR PROPORTION, SUFFICIENT TO LOWER THE POUR POINT THEREOF, OF THE PRODUCT OBTAINED BY REACTING ABOUT 6 PARTS BY WEIGHT OF MALEIC ANHYDRIDE WITH ABOUT 5 PARTS BY WEIGHT OF STYRENE TO PRODUCE A COPOLYMER, AND THEN ESTERIFYING SAID COPOLYMER WITH A MIXTURE OF SATURATED ALIPHATIC ALCOHOLS HAVING AN AVERAGE OF ABOUT 14 CARBON ATOMS PER MOLECULE IN A STRAIGTH CHAIN.
Claim 2
Dependent Claim
67 words
A MINERALI LUBRICATING OIL CONTAINING A MINOR PROPORTION, SUFFICIENT TO LOWER THE POUR POINT THEREOF, OF THE PRODUCT OBTAINED BY REACTING ABOUT 6 PARTS BY WEIGHT OF MALEIC ANHYDRIDE WITH ABOUT 5 PARTS BY WEIGHT OF STYRENE TO PRODUCE A COPOLYMER, AND THEN ESTERIFYING SAID COPOLYMER WITH A MIXTURE OF SATURATED ALIPHATIC ALCOHOLS HAVING AN AVERAGE OF ABOUT 14 CARBON ATOMS PER MOLECULE IN A STRAIGTH CHAIN.
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) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |