US3694176A
Expired / Lapsed
US
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Polymers comprising ethylene and ethylenically unsaturated dicarboxylic acids or esters thereof,and oil compositions containing said polymers
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1968-04-01
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Granted: 1972-09-26
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Expires: 1988-04-01
Abstract
Abstract POLYMERS COMPRISING A MAJOR MOLAR AMOUNT OF ETHYLENE AND A MINOR MOLAR AMOUNT OF AN ALPHA-BETA ETHYLENICALLY UNSATURATED DICARBOXYLIC TYPE MONOMER SUCH AS: DICARBOXYLIC ACID, OR ITS ANHYDRIDE, OR A MONO OR DIESTER THEREOF, HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF ABOUT 500 TO 50,000 ARE USEFUL AS WAY CRYSTAL MODIFIERS IN PETROLEUM OIL.
Inventors
- 👤 Harold N Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:24
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08F; C08F22/00; C08F22/04; C08F22/10; C08F22/26; C08L; C08L91/00; C08L91/06; C08L91/08; C10G; C10G73/00; C10G73/02; C10G73/04; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/086
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |