US4469879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trichloropolyfluoro-bicyclo ethers
Assignee: National Institute of Advanced Industrial Science and Technology
•
Filing: 1983-01-14
•
Granted: 1984-09-04
•
Expires: 2003-01-14
Abstract
Abstract Trichloropolyfluoro-bicyclo ethers are novel compounds, useful as a solvent or thermal medium for various pharmaceutical chemicals. They are produced by the reaction of perfluoro-bicyclo ether with anhydrous aluminum chloride.
Inventors
- 👤 Takashi Abe
- 👤 Hajime Baba
- 👤 Eiji Hayashi
- 👤 Shunji Nagase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:49
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/78; C07D307/82; C07D307/93; C07D307/935
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
46 words
A trichloropolyfluoro-bicyclo ether of the formula: ##STR5## wherein A is one member selected from the class consisting of a hexafluoropropylene group and an octafluorobutylene group and Rf is one member selected from the class consisting of a fluorine atom, a trifluoromethyl group, and a pentafluoroethyl group.
Claim 2
Dependent Claim
46 words
A trichloropolyfluoro-bicyclo ether of the formula: ##STR5## wherein A is one member selected from the class consisting of a hexafluoropropylene group and an octafluorobutylene group and Rf is one member selected from the class consisting of a fluorine atom, a trifluoromethyl group, and a pentafluoroethyl group.
Claim 3
Dependent Claim
18 words
The trichloropolyfluoro-bicyclo ether of claim 1 wherein A is a hexafluoropropylene group and Rf is a fluorine atom.
Claim 4
Dependent Claim
18 words
The trichloropolyfluoro-bicyclo ether of claim 1 wherein A is an octafluorobutylene group and Rf is a trifluoromethyl group.
Claim 5
Dependent Claim
18 words
The trichloropolyfluoro-bicyclo ether of claim 1 wherein A is a hexafluoropropylene group and Rf is a pentafluoroethyl group.
Claim 6
Dependent Claim
18 words
The trichloropolyfluoro-bicyclo ether of claim 1 wherein A is a octafluorobutylene group and Rf is a pentafluoroethyl group.
Claim 7
Dependent Claim
9 words
The trichloropolyfluoro-bicyclo ether of claim 1 which is perfluoro-(6,8,8-trichloro-7-oxa-bicyclo-(4,3,0)-nonane).
Claim 8
Dependent Claim
9 words
The trichloropolyfluoro-bicyclo ether of claim 1 which is perfluoro-(9-methyl-6,8,8-trichloro-7-oxa-bicyclo-(4,3,0)-nonane.
Claim 9
Dependent Claim
9 words
The trichloropolyfluoro-bicyclo ether of claim 1 which is perfluoro-(1,3,3-trichloro-2-oxa-bicyclo-(3,3,0)-octane.
Claim 10
Dependent Claim
9 words
The trichloropolyfluoro-bicyclo ether of claim 1 which is perfluoro-(4-methyl-1,3,3-trichloro-2-oxa-bicyclo-(3,3,0)-octane.
Claim 11
Dependent Claim
9 words
The trichloropolyfluoro-bicyclo ether of claim 1 which is perfluoro-(4-ethyl-1,3,3-trichloro-2-oxa-bicyclo-(3,3,0)-octane.
References Cited (Backward Citations)
JPH1040846A
Cited
JPH1063316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |