Patent US2859923A successfully refreshed from Google Patents.
US2859923A
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Constant tension unwinding mechanism
Assignee: Individual
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Filing: 1956-11-16
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Granted: 1958-11-11
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Expires: 1976-11-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Richard Le Baron Bowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:12
CPC Classifications
D; D06; D06B; D06B3/00; D06B3/34; D06B3/345; B; B65; B65H; B65H23/00; B65H23/04; B65H23/06; B65H23/063; B65H23/18; B65H59/00; B65H59/38; B65H59/382; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2392226A
Cited
US2631791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |