Patent US2895949A successfully refreshed from Google Patents.
US2895949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of acrylonitrile
Assignee: Wyeth Holdings LLC
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Filing: 1953-08-20
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Granted: 1959-07-21
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Expires: 1973-08-20
Abstract
No abstract record available.
Inventors
- 👤 Walter M Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:29
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A DYEABLE, FIBER-FORMABLE, DIMETHLFORMAMIDE SOLUBLE POLYACRYLONITRILE COMPOSISTION WHEREIN THE SOLE ACRYLONITRILE POLYMER IS A TERNARY POLYMER OF A MIXTURE OF COMONOMERS CONSISTING OF BY WEIGHT,FROM 2 TO 8% OF A MEMBER OF THE CLASS CONSISTING OF ACRYLAMIDE AND METHACRYLAMIDE, FROM 2.5 TO 5.0% OF AT LEAST ONE ALKYL VINYLPYRININE REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
53 words
A DYEABLE, FIBER-FORMABLE, DIMETHLFORMAMIDE SOLUBLE POLYACRYLONITRILE COMPOSISTION WHEREIN THE SOLE ACRYLONITRILE POLYMER IS A TERNARY POLYMER OF A MIXTURE OF COMONOMERS CONSISTING OF BY WEIGHT,FROM 2 TO 8% OF A MEMBER OF THE CLASS CONSISTING OF ACRYLAMIDE AND METHACRYLAMIDE, FROM 2.5 TO 5.0% OF AT LEAST ONE ALKYL VINYLPYRININE REPRESENTED BY THE FORMULA
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |