US2873786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making zero-radius bends in rectangular tubing
Assignee: AT&T Inc
•
Filing: 1954-02-26
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Granted: 1959-02-17
•
Expires: 1974-02-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Francis J Fuchs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:49
CPC Classifications
B; B21; B21D; B21D9/00; B21D9/05; B21D9/07; B21D9/073
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US347488A
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US620227A
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US709282A
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GB190318896A
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US973401A
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US951717A
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US1714083A
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US2057916A
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US2094303A
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US2044322A
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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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |