Patent US2621391A successfully refreshed from Google Patents.
US2621391A
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Yarn feeding and tensioning device and process
Assignee: EIDP Inc
•
Filing: 1949-10-20
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Granted: 1952-12-16
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Expires: 1969-10-20
Abstract
No abstract record available.
Inventors
- 👤 Hoffman Robert Michael
- 👤 Signaigo Frank Kerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:43
CPC Classifications
D; D01; D01G; D01G1/00; D01G1/02; D01G1/04; Y; Y10; Y10S; Y10S264/00; Y10S264/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2100588A
Cited
US2173789A
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US2302790A
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US2258661A
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US2340985A
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US2300791A
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US2447982A
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US2426757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |