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Patent US2874446A successfully refreshed from Google Patents.
US2874446A
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Method of producing a tow of filamentary material
Assignee: Wyeth Holdings LLC
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Filing: 1955-11-04
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Granted: 1959-02-24
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Expires: 1975-11-04
Abstract
No abstract record available.
Inventors
- 👤 William N Sellers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:54
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12; D01; D01D; D01D10/00; D01D10/04; D01D10/0436; D01D5/00; D01D5/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2303476A
Cited
US2379824A
Cited
GB595634A
Cited
US2575838A
Cited
US2669001A
Cited
US2715309A
Cited
US2686339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |