Patent US2671067A successfully refreshed from Google Patents.
US2671067A
Expired / Lapsed
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Dimethylene glycolamides as solvents for acrylonitrile polymers
Assignee: EIDP Inc
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Filing: 1951-11-26
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Granted: 1954-03-02
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Expires: 1971-11-26
Abstract
No abstract record available.
Inventors
- 👤 Brown Robert Lowry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:10
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J2333/00; C08J2333/18; C08J2333/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A NEW COMPOSITION OF MATTER COMPRISING A MIXTURE OF AN ACRYLONITRILE POLYMER CONTAINING AT LEAST 85% ACRYLONITRILE AND A DIMETHYLENE GLYCOLAMIDE HAVING THE FOLLOWING STRUCTURE
Claim 2
Dependent Claim
25 words
A NEW COMPOSITION OF MATTER COMPRISING A MIXTURE OF AN ACRYLONITRILE POLYMER CONTAINING AT LEAST 85% ACRYLONITRILE AND A DIMETHYLENE GLYCOLAMIDE HAVING THE FOLLOWING STRUCTURE
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) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |