US3662009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of unsaturated fluorocompounds
Assignee: Phillips Petroleum Co
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Filing: 1969-11-24
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Granted: 1972-05-09
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Expires: 1989-11-24
Abstract
Abstract UNSATURATED FLUOROCOMPOUNDS ARE PRODUCED BY A COMBINATION OF STEPS COMPRISING (A) REACTING A PERHALOETHYLENE WITH AN UNSATURATED COMPOUND TO PRODUCE A CORRSPONDING CYCLOBUTANE DERIVATIVE TO OBTAIN THE CORRESPONDING PERFLUOROCYCLOBUTANE DERIVATIVE, (C) PYROLYZING SAID PERFLUOROCYCLOBUTANE DERIVATIVE TO FORM THE UNSATURATED PERFLUOROCOMPOUND AND SAID STARTING PERHALOETHYLENE, AND (D) RECYCLING AT LEAST A PORTION OF SAID PERHALOETHYLENE FORMED IN SAID STEP (C) TO SAID STEP (A).
Inventors
- 👤 William M Hutchinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:29
CPC Classifications
C; C07; C07C; C07C21/00; C07C21/02; C07C21/18; C07C21/185; C07C17/00; C07C17/093; C07C17/10; C07C17/26; C07C17/272; C07C17/275; C07C17/278; C07C17/361; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 0
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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) | 1975-05-09 | 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 |