US2492581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for tensioning yarn
Assignee: North American Rayon Corp
•
Filing: 1947-12-20
•
Granted: 1949-12-27
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Expires: 1967-12-20
Abstract
No abstract record available.
Inventors
- 👤 Chadwick B Kingsbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:17
CPC Classifications
D; D01; D01H; D01H13/00; D01H13/10; D01H13/104; D01H13/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE545462C
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US1238716A
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US1132050A
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GB162323A
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GB366157A
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DE563593C
Cited
US2010255A
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US2338539A
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US2374085A
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US2397153A
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US2445721A
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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) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |