US4535175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorodioxoles
Assignee: EIDP Inc
•
Filing: 1984-04-18
•
Granted: 1985-08-13
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Expires: 2004-04-18
Abstract
Abstract Novel fluorodioxoles which may have Cl or F substituents in the 4 or 5 positions and have two F or CF 3 substituents in the 2 position are useful monomers for the preparation of homopolymers and copolymers with tetrafluoroethylene and terpolymers with tetrafluoroethylene and vinylidene fluoride. The homopolymers are suitable for glazing materials, while copolymers are useful, among others, for corrosion-resistant seals, gaskets, and linings.
Inventors
- 👤 Edward N. Squire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:47
CPC Classifications
C; C08; C08F; C08F34/00; C08F34/02; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/32; C07D317/42; C08F214/00; C08F214/18; C08F214/26; C08F214/262
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
64 words
A fluorodioxole having the following formula ##STR6## wherein Y is hydrogen or chlorine; Z is hydrogen, fluorine, or chlorine; and R is fluorine or the trifluoromethyl group; with the proviso that when one of Y and Z is hydrogen, the other one of Y and Z is other than chlorine; and when R is trifluoromethyl, only one of Y and Z can be hydrogen.
Claim 2
Dependent Claim
64 words
A fluorodioxole having the following formula ##STR6## wherein Y is hydrogen or chlorine; Z is hydrogen, fluorine, or chlorine; and R is fluorine or the trifluoromethyl group; with the proviso that when one of Y and Z is hydrogen, the other one of Y and Z is other than chlorine; and when R is trifluoromethyl, only one of Y and Z can be hydrogen.
Claim 3
Dependent Claim
9 words
A fluorodioxole of claim 1 wherein Y is hydrogen.
Claim 4
Dependent Claim
11 words
A fluorodioxole of claim 2 wherein Z is hydrogen or fluorine.
Claim 5
Dependent Claim
9 words
A fluorodioxole of claim 2 wherein R is fluorine.
Claim 6
Dependent Claim
9 words
A fluorodioxole of claim 2 wherein R is trifluoromethyl.
Claim 7
Dependent Claim
9 words
A fluorodioxole of claim 1 wherein Y is chlorine.
Claim 8
Dependent Claim
9 words
A fluorodioxole of claim 6 wherein Z is fluorine.
Claim 9
Dependent Claim
9 words
A fluorodioxole of claim 6 wherein R is fluorine.
Claim 10
Dependent Claim
9 words
A fluorodioxole of claim 6 wherein R is trifluoromethyl.
Claim 11
Dependent Claim
16 words
A dioxolane having the formula ##STR7## wherein R is fluorine and Y is hydrogen or chlorine.
Claim 12
Dependent Claim
16 words
A dioxolane having the formula ##STR7## wherein R is fluorine and Y is hydrogen or chlorine.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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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) | 1988-08-12 | 1989-02-11 | 1989-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-12 | 1993-02-11 | 1993-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-12 | 1997-02-11 | 1997-08-13 | $7700.00 | Window Closed / Lapsed |