US3591502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers containing ethylene and unsaturated ketones are wax crystal modifiers for mineral oil
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1968-07-15
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Granted: 1971-07-06
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Expires: 1988-07-15
Abstract
Abstract COPOLYMERS OF ETHYLENE AND OF ETHYLENICALLY UNSATURATED KETONE, HAVING NUMBER AVERAGE MOLECULAR WEIGHTS OF 1,000 TO 50,000 ARE USEFUL AS WAX CRYSTAL MODIFIERS FOR DISTILLATE HYDROCARBON FUEL OILS WHERE THEY CAN BE USED TO DEPRESS THE POUR POINT AND IMPROVE FLOW AND CAN ALSO BE USED AS DEWAXING AIDS IN PREPARING LIGHT DISTILLATE LUBRICATING OILS.
Inventors
- 👤 Stephan Ilnvokyj
- 👤 Syed S H Gilani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:59
CPC Classifications
C; C08; C08F; C08F10/00; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/192; C10L1/195; C10L1/1955
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |