Patent US4414368A successfully refreshed from Google Patents.
US4414368A
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Chlorosulfonated polysulfones and derivatives thereof
Assignee: Albany International Corp
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Filing: 1982-12-27
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Granted: 1983-11-08
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Expires: 2002-12-27
Abstract
Abstract Polysulfone sulfonyl chlorides are described, which are useful as intermediates in the preparation of novel polysulfone sulfonamides.
Inventors
- 👤 Myron J. Coplan
- 👤 Chunghi H. Park
- 👤 Samuel C. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:02
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/66; B01D71/68; B01D67/00; B01D67/0081; B01D67/0093; B01D67/00931; C; C08; C08G; C08G65/00; C08G65/34; C08G65/48; C08G75/00; C08G75/20; C08G75/23; B01D2323/00; B01D2323/08; B01D2323/082; B01D2325/00; B01D2325/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
11 words
A polysulfone sulfonyl chloride having recurring units of the formula: ##STR7##
Claim 2
Dependent Claim
11 words
A polysulfone sulfonyl chloride having recurring units of the formula: ##STR7##
Claim 3
Dependent Claim
23 words
The sulfonamide reaction product of the compound of claim 1 and a member selected from the group consisting of ammonia and an amine.
Claim 4
Dependent Claim
16 words
The quaternized product prepared by reacting the sulfonamide reaction product claim 2 with an alkyl halide.
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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) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |