US3823204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid dye dyeable acrylonitrile copolymer,fibers thereof and process for the preparation thereof
Assignee: Mitsubishi Chemical Corp
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Filing: 1972-08-02
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Granted: 1974-07-09
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Expires: 1992-08-02
Abstract
Abstract AN ACID DYE DYEABLE COPOLYMER OF ACRYLONITRILE, AN AMINO GROUP CONTAINING MONOMER AND A QUANTERNARY AMMONIUM SALT CONTAINING MONOMER, FIBERS PREPARED THEREFROM AND A PROCESS FOR PREPARING THE COPOLYMER AND THE FIBERS ARE DISCLOSED. ALSO DISCLOSED ARE BLENDS OF SAID COPOLYMER WITH OTHER COPOLYMERS OF ACRYLONITRILE.
Inventors
- 👤 H Okada
- 👤 M Beppu
- 👤 H Yoneyama
- 👤 E Ohta
- 👤 T Otani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:57
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/17; Y10S260/18
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |