Patent US3147322A successfully refreshed from Google Patents.
US3147322A
Expired / Lapsed
US
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Method for preparing acrylonitrile synthetic fiber
Assignee: Asahi Kasei Corp
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Filing: 1963-01-23
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Granted: 1964-09-01
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Expires: 1983-01-23
Abstract
No abstract record available.
Inventors
- 👤 Fujisaki Yoshisato
- 👤 Nakayama Chozo
- 👤 Kobayashi Hidehiko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:11
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38
Claims Analysis
Total Claims: 0
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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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |