US3661884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining crude amorphous polyolefins
Assignee: Phillips Petroleum Co
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Filing: 1969-07-07
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Granted: 1972-05-09
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Expires: 1989-07-07
Abstract
Abstract CRUDE AMORPHOUS POLYOLEFINS, BY-PRODUCTS OF POLYOLEFIN PRODUCTION, CONTAIN QUANTITIES OF CATALYST RESIDUES INCLUDING DISCOLORING AGENTS SUCH THAT THE CRUDE MATERIAL IS DARK, HIGHLY VISCOUS-TO-SOLIDS, FLAMMABLE AND CORROSIVE WASTE. BY TREATING THE CRUDE PRODUCT IN A LIQUID TWOPHASE PURIFICATION PROCESS, THE AMORPHOUS POLYOLEFIN IS SEPARATED AND RECOVERED AS A USABLE, SAFE-TO-HANDLE, ESSENTIALLY COLOR FREE, MATERIAL. THE CATALYST RESIDUE ALSO IS RECOVERED.
Inventors
- 👤 Francis J Shell
- 👤 Norris D Zetmeir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:40
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/02
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |