US2467553A
Expired / Lapsed
US
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Wet-spinning acrylonitrile polymers
Assignee: EIDP Inc
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Filing: 1947-05-08
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Granted: 1949-04-19
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Expires: 1967-05-08
Abstract
No abstract record available.
Inventors
- 👤 Hare Weston Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:36
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18
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) | 1952-04-18 | 1952-10-18 | 1953-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-18 | 1956-10-18 | 1957-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-18 | 1960-10-18 | 1961-04-19 | $7700.00 | Window Closed / Lapsed |