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US4332954A
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Cyclic sulfoperfluoroaliphaticcarboxylic acid anhydrides
Assignee: 3M Co
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Filing: 1981-01-30
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Granted: 1982-06-01
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Expires: 2001-01-30
Abstract
Abstract Cyclic sulfoperfluoroaliphaticcarboxylic acid anhydrides, amide derivatives thereof, a process for making the same, curable compositions containing cyclic sulfoperfluoroaliphaticcarboxylic acid anhydrides or amide derivatives thereof and cationically-sensitive monomers, and a process for using cyclic sulfoperfluoroaliphaticcarboxylic acid anhydrides or amide derivatives thereof as catalysts for the cure of cationically-sensitive monomers.
Inventors
- 👤 Robert J. Koshar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:05
CPC Classifications
C; C07; C07D; C07D327/00; C07D327/02; C07D327/04; C08; C08G; C08G85/00; C08K; C08K5/00; C08K5/36; C08K5/45; C08K5/46
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
63 words
Cyclic anhydrides of omega-sulfoperfluoroaliphaticcarboxylic acids, having the formula: ##STR9## wherein R f is perfluoroalkylene having 2 to 5 catenary carbon atoms or perfluorocycloalkylene having 4 to 7 ring atoms, R f optionally being substituted by one or more straight chain, branched, or cyclic perfluoroalkyl groups of 1 to 12 carbon atoms, with R f having a total of up to 14 carbon atoms.
Claim 2
Dependent Claim
63 words
Cyclic anhydrides of omega-sulfoperfluoroaliphaticcarboxylic acids, having the formula: ##STR9## wherein R f is perfluoroalkylene having 2 to 5 catenary carbon atoms or perfluorocycloalkylene having 4 to 7 ring atoms, R f optionally being substituted by one or more straight chain, branched, or cyclic perfluoroalkyl groups of 1 to 12 carbon atoms, with R f having a total of up to 14 carbon atoms.
Claim 3
Dependent Claim
38 words
Compounds according to claim 1, wherein R f is perfluoroalkylene having 2 to 5 catenary carbon atoms, R f optionally being substituted by one or more straight chain or branched perfluororalkyl groups of 1 to 4 carbon atoms.
Claim 4
Dependent Claim
18 words
Compounds according to claim 1, wherein R f is --CF 2 --m and m is 2 to 4.
Claim 5
Dependent Claim
10 words
A compound according to claim 3, wherein m is 2.
Claim 6
Dependent Claim
10 words
A compound according to claim 3, wherein m is 3.
Claim 7
Dependent Claim
10 words
A compound according to claim 3, wherein m is 4.
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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) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |