US2756218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solutions of acrylonitrile polymers in 1, 5-dimethylpyrrolidone-2
Assignee: Solutia Inc
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Filing: 1953-10-09
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Granted: 1956-07-24
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Expires: 1973-10-09
Abstract
No abstract record available.
Inventors
- 👤 George E Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:37
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/096; C08L; C08L33/00; C08L33/18; C08L33/20; C08J2333/00; C08J2333/18; C08J2333/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A NEW COMPOSITION OF MATTER COMPRISING A HOMOGENEOUS MISCIBLE MIXTURE OF FROM 65 TO 95 PERCENT BY WEIGHT OF 1,5-DIMETHYLPYRROLIDONE-2 AND FROM 5 TO 35 PERCENT OF A POLYMER OF WHICH ACRYLONITRILE IS AT LEAST 70 PERCENT OF THE TOTAL POLYMERIZED MONOMER CONTENT OF THE POLYMER.
Claim 2
Dependent Claim
46 words
A NEW COMPOSITION OF MATTER COMPRISING A HOMOGENEOUS MISCIBLE MIXTURE OF FROM 65 TO 95 PERCENT BY WEIGHT OF 1,5-DIMETHYLPYRROLIDONE-2 AND FROM 5 TO 35 PERCENT OF A POLYMER OF WHICH ACRYLONITRILE IS AT LEAST 70 PERCENT OF THE TOTAL POLYMERIZED MONOMER CONTENT OF THE POLYMER.
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) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |