US2837500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of acrylonitrile with alkenylaromatic sulfonic acids or salts
Assignee: EIDP Inc
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Filing: 1953-08-03
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Granted: 1958-06-03
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Expires: 1973-08-03
Abstract
No abstract record available.
Inventors
- 👤 Andres Raymond Joseph
- 👤 Sweeny Wilfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:37
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; C08F220/46; Y; Y10; Y10S; Y10S260/00; Y10S260/14; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A COPOLYMER OBTAINED BY COPOLYMERIZING A MIXTURE COMPRISING TWO VINYL MONOMERS, ONE OF THE SAID MONOMERS BEING A VINYLARENESULFONATE SELECTED FROM THE GROUP CONSISTING OF VINYLARENESULFONIC ACIDS AND THEIR HYDROLYZABLE WATER-SOLUBLE SALTS, AND THE OTHER VINYL MONOMER BEING ACRYLONITRILE AND BEING PRESENT IN THE AMOUNT OF AT LEAST 70% OF THE TOTAL MONOMER MIXTURE, SAID COPOLYMER HAVING SULFO GROUPS UNIFORMLY AND DEFINTELY LOCATED IN THE SAID COPOLYMER.
Claim 2
Dependent Claim
67 words
A COPOLYMER OBTAINED BY COPOLYMERIZING A MIXTURE COMPRISING TWO VINYL MONOMERS, ONE OF THE SAID MONOMERS BEING A VINYLARENESULFONATE SELECTED FROM THE GROUP CONSISTING OF VINYLARENESULFONIC ACIDS AND THEIR HYDROLYZABLE WATER-SOLUBLE SALTS, AND THE OTHER VINYL MONOMER BEING ACRYLONITRILE AND BEING PRESENT IN THE AMOUNT OF AT LEAST 70% OF THE TOTAL MONOMER MIXTURE, SAID COPOLYMER HAVING SULFO GROUPS UNIFORMLY AND DEFINTELY LOCATED IN THE SAID COPOLYMER.
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) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |