Patent US3556990A successfully refreshed from Google Patents.
US3556990A
Expired / Lapsed
US
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Reverse osmosis purification of hydrocarbon fuels
Assignee: Individual
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Filing: 1967-12-05
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Granted: 1971-01-19
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Expires: 1987-12-05
Abstract
Abstract LIQUID HYDROCARBON FUELS ARE PURIFIED BY FORCING THE FUEL UNDER PRESSURE THROUGH A HYDROCARBON-INSOLUBLE OLEOPHYLIC FILM. THE LIQUID HYDROCARBON FUEL WETS THE FILM BECAUSE THE FILM COMPRISES AT LEAST 20% BY WEIGHT OF SIDE CHAINS HAVING A TERMINAL HYDROCARBON GROUP CONTAINING AT LEAST FOUR CARBON ATOMS AND THE FILM IS RENDERED INSOLUBLE TO LIQUID HYDROCARBONS BY BEING CROSSLINKED WITH FROM 0.5-15% BY WEIGHT OF CROSS-LINKING AGENT. A TYPICAL FILM IS CONSTITUTED BY A SOLUTION COPOLYMER CONTAINING A LARGE PROPORTION OF LONG CHAIN ACRYLATE OR METHACRYLATE ESTER WHICH IS CROSS-LINKED WITH DIVINYL BENZENE.
Inventors
- 👤 Arnold G Gulko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:22
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/02; B01D61/025; C; C10; C10G; C10G31/00; C10G31/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |