US2531408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interpolymers of acrylonitrile and itaconic acid
Assignee: Industrial Rayon Corp
•
Filing: 1946-12-13
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Granted: 1950-11-28
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Expires: 1966-12-13
Abstract
No abstract record available.
Inventors
- 👤 Alelio Gaetano F D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:04
CPC Classifications
C; C08; C08F; C08F22/00; D; D01; D01F; D01F6/00; D01F6/02; D01F6/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A COMPOSITION OF MATTER COMPRISING A COPOLYMER OF ACRYLONITRILE AND ITACONIC ACID, SAID COPOLYMER CONTAINING IN THE POLYMER MOLECULE AT LEAST ABOUT 36 PERCENT BY WEIGHT ACRYLONITRILE AND AT LEAST ABOUT 1 PERCENT BUT NO MORE THAN ABOUT 5 PERCENT BY WEIGHT ITACONIC ACID.
Claim 2
Dependent Claim
44 words
A COMPOSITION OF MATTER COMPRISING A COPOLYMER OF ACRYLONITRILE AND ITACONIC ACID, SAID COPOLYMER CONTAINING IN THE POLYMER MOLECULE AT LEAST ABOUT 36 PERCENT BY WEIGHT ACRYLONITRILE AND AT LEAST ABOUT 1 PERCENT BUT NO MORE THAN ABOUT 5 PERCENT BY WEIGHT ITACONIC ACID.
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) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |