Patent US9431904B2 successfully refreshed from Google Patents.
US2977337A
Expired / Lapsed
US
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Cyanoethylated polyacrylonitrile compositions
Assignee: Wyeth Holdings LLC
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Filing: 1956-03-21
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Granted: 1961-03-28
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Expires: 1976-03-21
Abstract
No abstract record available.
Inventors
- 👤 Walter H Schuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:46
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE METHOD OF PREPARING AN ALPHA-CARBON CYANOETHYLATED POLYACRYLONITRILE COMPOSITION WHICH COMPRISES DISSOLVING, IN THE ABSENCE OF WATER, MONOMERIC ACRYLONITRILE AND A FREE-RADICAL INITIATED LINEAR POLYMER OF ACRYLONITRILE CONTAINING, COMBINED IN THE POLYMER MOLECULE, FROM 50% TO 100% BY WEIGHT OF ACRYLONITRILE AND UP TO 50% BY WEIGHT OF A COMPOUND WHICH IS COPOLYMERIZABLE WITH ACRYLONITRILE AND CONTAINS A CH2=C< GROUPING, AND SAID POLYMER CONTAINING IN ITS MOLECULAR STRUCTURE A MULTIPLICITY OF UNITS REPRESENTED BY THE FORMULA
Claim 2
Independent Claim
76 words
THE METHOD OF PREPARING AN ALPHA-CARBON CYANOETHYLATED POLYACRYLONITRILE COMPOSITION WHICH COMPRISES DISSOLVING, IN THE ABSENCE OF WATER, MONOMERIC ACRYLONITRILE AND A FREE-RADICAL INITIATED LINEAR POLYMER OF ACRYLONITRILE CONTAINING, COMBINED IN THE POLYMER MOLECULE, FROM 50% TO 100% BY WEIGHT OF ACRYLONITRILE AND UP TO 50% BY WEIGHT OF A COMPOUND WHICH IS COPOLYMERIZABLE WITH ACRYLONITRILE AND CONTAINS A CH2=C< GROUPING, AND SAID POLYMER CONTAINING IN ITS MOLECULAR STRUCTURE A MULTIPLICITY OF UNITS REPRESENTED BY THE FORMULA
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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |