US3405081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solubilization of polyacrylonitriles and cellulose in liquid sulfur dioxide
Assignee: Individual
•
Filing: 1966-06-02
•
Granted: 1968-10-08
•
Expires: 1986-06-02
Abstract
No abstract record available.
Inventors
- 👤 Hata Kunio
- 👤 Yokota Kingo
- 👤 Hasegawa Akira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:43
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; C; C08; C08J; C08J3/00; C08J3/02; C08K; C08K3/00; C08K3/30; C08K5/00; C08K5/36; C08K5/41; C08L; C08L67/00; C08L67/02; D01F6/28; D01F6/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2404728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |