Patent US2668019A successfully refreshed from Google Patents.
US2668019A
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US
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Strand tension control mechanism
Assignee: AT&T Inc
•
Filing: 1949-07-07
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Granted: 1954-02-02
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Expires: 1969-07-07
Abstract
No abstract record available.
Inventors
- 👤 Leo G Holt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:47
CPC Classifications
B; B65; B65H; B65H59/00; B65H59/10; B65H59/18; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US501961A
Cited
US1343910A
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US1374335A
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US1894562A
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US1959680A
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US1838967A
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US1925866A
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US2011371A
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US2353639A
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US2343461A
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US2459064A
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US2583148A
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US2468557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |