US3226461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of regenerated cellulose fibers from viscose
Assignee: Courtaulds North America Inc
•
Filing: 1963-02-25
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Granted: 1965-12-28
•
Expires: 1983-02-25
Abstract
No abstract record available.
Inventors
- 👤 Harold F Wise
- 👤 Klein Elias
- 👤 Donald S Nelson
- 👤 William C Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:00
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; Y; Y10; Y10S; Y10S264/00; Y10S264/27
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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |