US3460897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mild alkaline oxidation treatment of polyacrylonitrile fibers or films to improve flexibility and dyeability
Assignee: Dow Chemical Co
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Filing: 1965-06-25
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Granted: 1969-08-12
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Expires: 1985-06-25
Abstract
No abstract record available.
Inventors
- 👤 Fred J Lowes Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:35
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/673; D06P1/67333; D06P1/6735; D06P1/67358; D06M; D06M11/00; D06M11/07; D06M11/30; D06M11/32; D06M11/36; D06M11/38; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
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) | 1972-08-11 | 1973-02-10 | 1973-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-11 | 1977-02-10 | 1977-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-11 | 1981-02-10 | 1981-08-12 | $7700.00 | Window Closed / Lapsed |