Patent US2616853A successfully refreshed from Google Patents.
US2616853A
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Mineral oil composition containing alcohol and amine derivatives of maleic anhydride-itaconic acid ester copolymers as pour point depressants and viscosity index improvers
Assignee: ExxonMobil Oil Corp
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Filing: 1949-05-11
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Granted: 1952-11-04
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Expires: 1969-05-11
Abstract
No abstract record available.
Inventors
- 👤 John J Giammaria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:52
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08F; C08F22/00; C08F22/04; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/086; C10M2217/00; C10M2217/02; C10M2217/024; C10M2217/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A MINERAL LUBRICATING OIL CONTAINING FROM ABOUT 0.01 PER CENT TO ABOUT 50 PER CENT OF A PRODUCT PRODUCED BY (1) COPOLYMERIZING MALEIC ANHYDRIDE WITH A DIESTER OF ITACONIC ACID, SAID DIESTER HAVING BEEN OBTAINED BY ESTERIFYING ITACONIC ACID WITH A PRIMARY, NORMAL, MONOHYDRIC, SATURATE, ALIPHATIC ALCOHOL, TO FORM A COPOLYMER AND THEN (2) REACTING SAID COPOLYMER WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A PRIMARY, NORMAL, MONOHYDRIC, SATURATED, ALIPHATIC ALCOHOL AND AN AMINE SELECTED FROM THE PRIMARY AND SECONDARY AMINES.
Claim 2
Dependent Claim
83 words
A MINERAL LUBRICATING OIL CONTAINING FROM ABOUT 0.01 PER CENT TO ABOUT 50 PER CENT OF A PRODUCT PRODUCED BY (1) COPOLYMERIZING MALEIC ANHYDRIDE WITH A DIESTER OF ITACONIC ACID, SAID DIESTER HAVING BEEN OBTAINED BY ESTERIFYING ITACONIC ACID WITH A PRIMARY, NORMAL, MONOHYDRIC, SATURATE, ALIPHATIC ALCOHOL, TO FORM A COPOLYMER AND THEN (2) REACTING SAID COPOLYMER WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A PRIMARY, NORMAL, MONOHYDRIC, SATURATED, ALIPHATIC ALCOHOL AND AN AMINE SELECTED FROM THE PRIMARY AND SECONDARY AMINES.
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) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |