Patent US3655800A successfully refreshed from Google Patents.
US3655800A
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US
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Method for carrying out reactions of unsaturated hydrocarbons at low temperatures
Assignee: Atlantic Richfield Co
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Filing: 1970-11-06
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Granted: 1972-04-11
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Expires: 1990-11-06
Abstract
Abstract METHOD FOR CARRYING OUT ALKYLATION, POLYMERIZATION OR HYDROGENATION REACTIONS OF UNSATURATED HYDROCARBONS BY CONTACTING THE UNSATURATED HYDROCARBON SUCH AS AN OLEFIN OR AROMATIC OR COMBINATION THEREOF WITH TUNGSTEN HEXAFLUORIDE AT TEMPERATURES BETWEEN 0*C. AND 50*C.
Inventors
- 👤 Maurice M Mitchell Jr
- 👤 Harold M Fisher
- 👤 Edward S Tomezsko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:42
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/03; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68; C08; C08F; C08F10/00; C07C2527/00; C07C2527/06; C07C2527/132
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |