US3996299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoro compound preparation
Assignee: Phillips Petroleum Co
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Filing: 1973-02-08
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Granted: 1976-12-07
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Expires: 1993-02-08
Abstract
Abstract Compounds of the formulas ##EQU1## and mixtures thereof are prepared by codimerization of R f -CF=CF 2 and R-CH=CH 2 . The cleavage product of the cyclobutane derivative is copolymerized.
Inventors
- 👤 George B. Fozzard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:24
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C07; C07C; C07C17/00; C07C17/26; C07C17/272; C07C17/275; C07C23/00; C07C23/02; C07C23/06; C08F; C08F214/00; C08F214/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
51 words
As a new composition of matter a compound of the formula ##EQU4## and mixtures thereof wherein R f is a perfluoroalkyl radical having 1-10 carbon atoms per molecule and wherein skeletal branching, if present, is no closer than the 2-position with respect to the carbon atom to which it is attached.
Claim 2
Dependent Claim
51 words
As a new composition of matter a compound of the formula ##EQU4## and mixtures thereof wherein R f is a perfluoroalkyl radical having 1-10 carbon atoms per molecule and wherein skeletal branching, if present, is no closer than the 2-position with respect to the carbon atom to which it is attached.
Claim 3
Dependent Claim
14 words
The composition of claim 1 wherein R f has 1-3 carbon atoms per molecule.
Claim 4
Dependent Claim
9 words
A composition according to claim 1 which is 1-trifluoromethyl-1,2,2-trifluorocyclobutane.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-07 | 1980-06-07 | 1980-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-07 | 1984-06-07 | 1984-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-07 | 1988-06-07 | 1988-12-07 | $7700.00 | Window Closed / Lapsed |