Patent US2649427A successfully refreshed from Google Patents.
US2649427A
Expired / Lapsed
US
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Compositions containing a polymer of acrylonitrile and nu, nu-dimethylacetamide
Assignee: EIDP Inc
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Filing: 1949-08-09
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Granted: 1953-08-18
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Expires: 1969-08-09
Abstract
No abstract record available.
Inventors
- 👤 Carl S Marvel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:39
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/096; D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; C08J2333/00; C08J2333/18; C08J2333/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A NEW COMPOSITION OF MATTER COMPRISING A HOMOGENEOUS LIQUID COMPRISING A POLYMER OF ACRYLONITRILE, CONTAINING IN THE POLYMER MOLECULE AT LEAST 85% BY WEIGHT OF ACRYLONITRILE, AND N,NDIMETHYLACETAMIDE, SAID LIQUID CONTAINING AT LEAST ABOUT 10% BY WEIGHT OF SAID POLYMER, BASED ON THE WEIGHT OF SAID LIQUID.
Claim 2
Dependent Claim
47 words
A NEW COMPOSITION OF MATTER COMPRISING A HOMOGENEOUS LIQUID COMPRISING A POLYMER OF ACRYLONITRILE, CONTAINING IN THE POLYMER MOLECULE AT LEAST 85% BY WEIGHT OF ACRYLONITRILE, AND N,NDIMETHYLACETAMIDE, SAID LIQUID CONTAINING AT LEAST ABOUT 10% BY WEIGHT OF SAID POLYMER, BASED ON THE WEIGHT OF SAID LIQUID.
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) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |