US3882093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonyl-containing fluorocarbon vinyl ethers and ion exchange membrane formed therefrom
Assignee: EIDP Inc
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Filing: 1974-01-02
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Granted: 1975-05-06
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Expires: 1994-01-02
Abstract
Abstract WHEREIN M IS AN INTEGER FROM 2 TO 5 AND N IS AN INTEGER FROM 2 TO 10. The sulfonyl-containing fluorocarbon vinyl ethers are prepared by monoaddition of sulfuryl fluoride to divinyl ethers in the presence of fluoride ions with the formed ethers useful in preparation of ion exchange polymers. Sulfonyl-containing fluorocarbon vinyl ethers are disclosed of the formula
Inventors
- 👤 Robert John Cavanaugh
- 👤 William H Calkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:46
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; C08J5/2237; C07; C07C; C07C303/00; C07C303/02; C08F; C08F16/00; C08F16/12; C08F16/14; C08F16/30; C08F28/00; C08J2327/00; C08J2327/02; C08J2327/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
74 words
A process involving the monoaddition of sulfuryl fluoride to a divinyl ether of the formula CF2 CFO (CF2CF2O)mCF CF2 or CF2 CFO(CF2)nOCF CF2 wherein m is an integer of from 2 to 5 and n is an integer from 2 to 10, comprising reaction in the presence of fluoride ions of sulfuryl fluoride with said divinyl ether present at an excess up to 300 mole percent over the stoichiometric amount needed for the monoaddition.
Claim 2
Dependent Claim
74 words
A process involving the monoaddition of sulfuryl fluoride to a divinyl ether of the formula CF2 CFO (CF2CF2O)mCF CF2 or CF2 CFO(CF2)nOCF CF2 wherein m is an integer of from 2 to 5 and n is an integer from 2 to 10, comprising reaction in the presence of fluoride ions of sulfuryl fluoride with said divinyl ether present at an excess up to 300 mole percent over the stoichiometric amount needed for the monoaddition.
Claim 3
Dependent Claim
23 words
THE PROCESS OF CLAIM 1 WHEREIN THE SULFURYL FLUORIDE AND SAID DIVINYL ETHER ARE INTIALLY PRESENT IN THE REACTION IN ESSENTIALLY EQUIMOLAR AMOUNTS.
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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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |