US2468771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing fibers and yarns
Assignee: University of Minnesota Twin Cities
•
Filing: 1944-04-03
•
Granted: 1949-05-03
•
Expires: 1964-04-03
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Montonna
- 👤 Lloyd H Reyerson
- 👤 Amdur Elias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:27
CPC Classifications
D; D01; D01C; D01C1/00; D01C1/02; Y; Y10; Y10S; Y10S56/00; Y10S56/02
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |