Patent US3287304A successfully refreshed from Google Patents.
US3287304A
Expired / Lapsed
US
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Acrylonitrile copolymers and compositions
Assignee: Asahi Kasei Corp
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Filing: 1963-01-03
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Granted: 1966-11-22
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Expires: 1983-01-03
Abstract
No abstract record available.
Inventors
- 👤 Fujisaki Yoshisato
- 👤 Nakayama Chozo
- 👤 Ohfuka Toshio
- 👤 Sato Hideo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:32
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; C08F220/46
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
54 words
A COMPOSITION COMPRISING A COPOLYMER OF ABOUT 80 TO 99.8% BY WEIGHT OF ACRYLONITRILE, ABOUT 0.2 TO 5% BY WEIGHT OF AT LEAST ONE COMPONENT SELECTED FROM THE GROUP CONSISTING OF A-SULFOACRYLONITRILE AND WATER-SOLUBLE SALTS THEREOF AND 0 TO ABOUT 19.8% BY WEIGHT OF AT LEAST ONE COMPONENT SELECTED FROM OTHER ETHYLENICALLY UNSATURATED COMPOUNDS.
Claim 2
Dependent Claim
54 words
A COMPOSITION COMPRISING A COPOLYMER OF ABOUT 80 TO 99.8% BY WEIGHT OF ACRYLONITRILE, ABOUT 0.2 TO 5% BY WEIGHT OF AT LEAST ONE COMPONENT SELECTED FROM THE GROUP CONSISTING OF A-SULFOACRYLONITRILE AND WATER-SOLUBLE SALTS THEREOF AND 0 TO ABOUT 19.8% BY WEIGHT OF AT LEAST ONE COMPONENT SELECTED FROM OTHER ETHYLENICALLY UNSATURATED COMPOUNDS.
Claim 3
Dependent Claim
72 words
A PROCESS FOR PRODUCING A POLYMERIC MATERIAL WHICH COMPRISES COPOLYMERIZING 80 TO 99.8% OF ACRYLONITRILE, WITH 0.2 TO 5% BY WEIGHT OF AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF A-SULFOACRYLONITRILE AND WATER-SOLUBLE SALTS THEREOF AND 0 TO ABOUT 19.8% BY WEIGHT OF AT LEAST ONE OTHER ETHYLENICALLY UNSATURATED COMPOUNDS COPOLYMERIZABLE THEREWITH, IN AN AQUEOUS MEDIUM WITH A PH OF 1.5 TO 4.0 AT A TEMPERATURE OF 20* TO 800C.
Claim 4
Dependent Claim
72 words
A PROCESS FOR PRODUCING A POLYMERIC MATERIAL WHICH COMPRISES COPOLYMERIZING 80 TO 99.8% OF ACRYLONITRILE, WITH 0.2 TO 5% BY WEIGHT OF AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF A-SULFOACRYLONITRILE AND WATER-SOLUBLE SALTS THEREOF AND 0 TO ABOUT 19.8% BY WEIGHT OF AT LEAST ONE OTHER ETHYLENICALLY UNSATURATED COMPOUNDS COPOLYMERIZABLE THEREWITH, IN AN AQUEOUS MEDIUM WITH A PH OF 1.5 TO 4.0 AT A TEMPERATURE OF 20* TO 800C.
References Cited (Backward Citations)
US2601256A
Cited
US3043811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |