US2696483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeable copolymers of acrylonitrile
Assignee: Solutia Inc
•
Filing: 1950-02-27
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Granted: 1954-12-07
•
Expires: 1970-02-27
Abstract
No abstract record available.
Inventors
- 👤 George E Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/28; D01F6/38; C; C08; C08F; C08F8/00; C08F8/34; C08F2800/00; C08F2800/20; D06; D06P; D06P3/00; D06P3/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A METHOD OF PREPARING DYE-RECEPTIVE, NON-HYDROLYZED, FIBER-FORMING COPOLYMERS, WHICH COMPRISES CHEMICALLY REACTING A COPOLYMER OF 75 TO 98 PERCENT BY WEIGHT OF ACRYLONITRILE AND FROM 2 TO 25 PERCENT OF A MONOMER HAVING THE STRUCTURAL FORMULA:
Claim 2
Independent Claim
36 words
A METHOD OF PREPARING DYE-RECEPTIVE, NON-HYDROLYZED, FIBER-FORMING COPOLYMERS, WHICH COMPRISES CHEMICALLY REACTING A COPOLYMER OF 75 TO 98 PERCENT BY WEIGHT OF ACRYLONITRILE AND FROM 2 TO 25 PERCENT OF A MONOMER HAVING THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2332899A
Cited
US2637620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |