Patent US1375269A successfully refreshed from Google Patents.
Patent US2641524A successfully refreshed from Google Patents.
US2641524A
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Acrylonitrile-vinyl amine interpolymers and method of making
Assignee: Akzo Nobel UK PLC
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Filing: 1949-07-13
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Granted: 1953-06-09
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Expires: 1969-07-13
Abstract
No abstract record available.
Inventors
- 👤 David W Chaney
- 👤 Helen G Sommar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:59
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/70; D06P3/74; C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; C08F8/00; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D06M; D06M11/00; D06M11/07; D06M11/30; Y; Y10; Y10S; Y10S8/00; Y10S8/06; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
12 words
AN ACRYLONITRILE INTERPOLYMER CONTAINING ACRYLONITRILE AND VINYL AMINE IN THE INTERPOLYMER MOLECULE.
Claim 2
Dependent Claim
12 words
AN ACRYLONITRILE INTERPOLYMER CONTAINING ACRYLONITRILE AND VINYL AMINE IN THE INTERPOLYMER MOLECULE.
Claim 3
Independent Claim
71 words
A METHOD OF PRODUCING AN ACRYLONITRILE INTERPOLYMER CONTAINING, IN THE INTERPOLYMER MOLECULE, ACRYLONITRILE AND VINYL AMINE, WHICH COMPRISES THE STEP OF TREATING A SHAPED ARTICLE OF AN ACRYLONITRILE POLYMER CONTAINING CN GROUPS AND CONH2 GROUPS WITH AN AQUEOUS ALKALINE SOLUTION OF SODIUM HYPOCHLORITE OF FROM 3 TO 6% CONCENTRATION FOR FROM 5 SECONDS TO 30 MINUTES, AT A TEMPERATURE INVERSELY RELATED TO THE TREATING TIME BETWEEN 65* C. AND 35* C.
Claim 4
Independent Claim
71 words
A METHOD OF PRODUCING AN ACRYLONITRILE INTERPOLYMER CONTAINING, IN THE INTERPOLYMER MOLECULE, ACRYLONITRILE AND VINYL AMINE, WHICH COMPRISES THE STEP OF TREATING A SHAPED ARTICLE OF AN ACRYLONITRILE POLYMER CONTAINING CN GROUPS AND CONH2 GROUPS WITH AN AQUEOUS ALKALINE SOLUTION OF SODIUM HYPOCHLORITE OF FROM 3 TO 6% CONCENTRATION FOR FROM 5 SECONDS TO 30 MINUTES, AT A TEMPERATURE INVERSELY RELATED TO THE TREATING TIME BETWEEN 65* C. AND 35* C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |