US4822863A
Expired / Lapsed
US
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Sulphuryl chloride/polyamide derivative
Assignee: Memtec Ltd
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Filing: 1985-10-29
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Granted: 1989-04-18
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Expires: 2005-10-29
Abstract
Abstract Aliphatic polyamides are reacted on their surfaces with sulphuryl chloride, either neat or in solution in paraffins or cycloparaffins to give reactive intermediate whcih may convert into a support capable of reaction with antibodies or enzymes by providing covalent chemical links to which the antibodies or enzymes may be bound.
Inventors
- 👤 Douglas L. Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:18
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/281; B01J20/286; B01J20/289; B01J20/22; B01J20/26; B01J20/262; B01J20/265; C; C07; C07K; C07K17/00; C07K17/02; C07K17/08; C08; C08G; C08G69/00; C08G69/48; C12; C12N; C12N11/00; C12N11/02; C12N11/08; C12N11/089; C12N11/096; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/543; G01N33/54353
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
20 words
A process comprising reacting an aliphatic polyamide with a solution consisting essentially of sulphuryl chloride and a paraffin or cycloparaffin.
Claim 2
Dependent Claim
20 words
A process comprising reacting an aliphatic polyamide with a solution consisting essentially of sulphuryl chloride and a paraffin or cycloparaffin.
Claim 3
Dependent Claim
15 words
A process according to claim 1, wherein the reaction is carried out under anhydrous conditions.
Claim 4
Dependent Claim
32 words
The process according to claim 1, wherein the reaction is carried out by soaking the polyamide in a 25% sulphuryl chloride solution in a paraffin or cycloparaffin for 5 to 15 minutes.
Claim 5
Dependent Claim
15 words
A process according to claim 1, wherein the polyamide is part of a polyamide membrane.
References Cited (Backward Citations)
US3549307A
Cited
US4119589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |