US3621066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted halocycloalkenes
Assignee: Dow Chemical Co
•
Filing: 1967-06-20
•
Granted: 1971-11-16
•
Expires: 1987-06-20
Abstract
Abstract Mono and diperhaloalkoxyperhalocycloalkenes and a method of their preparation are disclosed. These compounds exhibit excellent thermal stability and oxidative resistant characteristics when subjected to elevated temperatures.
Inventors
- 👤 Richard W Anderson
- 👤 Claude I Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:21
CPC Classifications
C; C07; C07C; C07C23/00; C07C23/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
11 words
The compound as defined in claim 1 wherein X'' is OR.
Claim 2
Dependent Claim
32 words
The compound as defined in claim 1 wherein R is the perfluoroisopropyl group, X'' is a member selected from the group consisting of fluorine and OR and n is the integer 2.
Claim 3
Dependent Claim
9 words
A process for preparing perfluoroalkoxyperhalocycloalkenes corresponding to the formula:
Claim 4
Dependent Claim
45 words
The process as defined in claim 4 wherein the reaction mass is heated in a sealed pressure reactor at from about 50* to about 150* C. for a period of from about 12 to about 48 hours under the autogenous pressure of the reaction mixture.
Claim 5
Dependent Claim
28 words
The process as defined in claim 4 wherein the perhalocycloalkene is perfluorocyclobutene. 7 The process as defined in claim 4 wherein the alkali metal fluoride is cesium fluoride.
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |