US3256252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of acrylonitrile copolymers
Assignee: Bayer AG
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Filing: 1962-02-14
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Granted: 1966-06-14
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Expires: 1982-02-14
Abstract
No abstract record available.
Inventors
- 👤 Kruckenberg Winfried
- 👤 Dinges Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:37
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; C08F220/46; C08F28/00; Y; Y10; Y10S; Y10S526/00; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN THE PROCESS OF PRODUCING ACRYLONITRILE COPOLYMERS CONTAINING AT LEAST 70% ACRYLONITRILE BY POLYMERIZING ACRYLONITRILE AND AT LEAST ONE OTHER MONOMER COPOLYMRIZABLE THEREWITH, THE STEP FOR OBTAINING COPOLYMERS OF IMPROVED DYEING CAPACITY OF POLYMERIZING A MEMBER SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND MIXTURES OF ACRYLONITRILE WITH ANOTHER MONOETHYLENICALLY UNSATURATED CO-MONOMER, WHEREIN SAID ACRYLONITRILE IS PRESENT IN AN AMOUNT OF AT LEAST 70% AND 0.1 TO 10% BASED ON THE MONOMERIC GROUP MEMBER OF A POLYMERIZABLE SULPHONIC ACID GROUP-CONTAINING COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
84 words
IN THE PROCESS OF PRODUCING ACRYLONITRILE COPOLYMERS CONTAINING AT LEAST 70% ACRYLONITRILE BY POLYMERIZING ACRYLONITRILE AND AT LEAST ONE OTHER MONOMER COPOLYMRIZABLE THEREWITH, THE STEP FOR OBTAINING COPOLYMERS OF IMPROVED DYEING CAPACITY OF POLYMERIZING A MEMBER SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND MIXTURES OF ACRYLONITRILE WITH ANOTHER MONOETHYLENICALLY UNSATURATED CO-MONOMER, WHEREIN SAID ACRYLONITRILE IS PRESENT IN AN AMOUNT OF AT LEAST 70% AND 0.1 TO 10% BASED ON THE MONOMERIC GROUP MEMBER OF A POLYMERIZABLE SULPHONIC ACID GROUP-CONTAINING COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2983712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |