Patent US2691641A successfully refreshed from Google Patents.
US2691641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber-forming blend of acrylonitrile polymers
Assignee: Solutia Inc
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Filing: 1952-03-01
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Granted: 1954-10-12
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Expires: 1972-03-01
Abstract
No abstract record available.
Inventors
- 👤 George E Ham
- 👤 Alfred B Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:53
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/18; C08L33/20; Y; Y10; Y10S; Y10S525/00; Y10S525/916
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A FIBER-FORMING BLEND OF (A) A POLYMER OF A MONOMERIC SUBSTANCE OF WHICH ACRYLONITRILE IS AT LEAST 80% BY WEIGHT OF ITS POLYMERIZABLE CONTENT AND UP TO 20% OF ANOTHER POLYMERIZABLE MONO-OLEFINIC MONOMER COPOLYMERIZABLE THEREWITH AND (B) A POLYMER OF AT LEAST 30% OF A COMPOUND HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
50 words
A FIBER-FORMING BLEND OF (A) A POLYMER OF A MONOMERIC SUBSTANCE OF WHICH ACRYLONITRILE IS AT LEAST 80% BY WEIGHT OF ITS POLYMERIZABLE CONTENT AND UP TO 20% OF ANOTHER POLYMERIZABLE MONO-OLEFINIC MONOMER COPOLYMERIZABLE THEREWITH AND (B) A POLYMER OF AT LEAST 30% OF A COMPOUND HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2118864A
Cited
US2491471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-11 | 1958-04-12 | 1958-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-11 | 1962-04-12 | 1962-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-11 | 1966-04-12 | 1966-10-12 | $7700.00 | Window Closed / Lapsed |