Patent FR886719A successfully refreshed from Google Patents.
US2674592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber-forming copolymers of acrylonitrile and isopropenylpyridines
Assignee: Solutia Inc
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Filing: 1950-09-15
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Granted: 1954-04-06
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Expires: 1970-09-15
Abstract
No abstract record available.
Inventors
- 👤 Earl W Gluesenkamp
- 👤 George E Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:45
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A COPOLYMER COMPRISING BY WEIGHT FROM 85 TO 99% ACRYLONITRILE AND FROM ONE TO 15% OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALPHA-ISOPROPENYLPYRIDINE, BETA-ISOPROPENYLPYRIDINE, GAMMA-ISOPROPENYLPYRIDINE AND ISOPROPENYLPYRIDINES CONTAINING A SINGLE METHYL GROUP ON THE HETEROCYCLIC RING, IN WHICH COPOLYMER THE ONLY NON-HETEROCYCLIC MONOMER IS ACRYLONITRILE, THE PERCENTAGE OF MONOMERS IN THE COPOLYMER TOTALING 100%.
Claim 2
Dependent Claim
56 words
A COPOLYMER COMPRISING BY WEIGHT FROM 85 TO 99% ACRYLONITRILE AND FROM ONE TO 15% OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALPHA-ISOPROPENYLPYRIDINE, BETA-ISOPROPENYLPYRIDINE, GAMMA-ISOPROPENYLPYRIDINE AND ISOPROPENYLPYRIDINES CONTAINING A SINGLE METHYL GROUP ON THE HETEROCYCLIC RING, IN WHICH COPOLYMER THE ONLY NON-HETEROCYCLIC MONOMER IS ACRYLONITRILE, THE PERCENTAGE OF MONOMERS IN THE COPOLYMER TOTALING 100%.
References Cited (Backward Citations)
US2467430A
Cited
US2491471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |