Patent US2902080A successfully refreshed from Google Patents.
US2902080A
Expired / Lapsed
US
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Apparatus for twisting wave guides
Assignee: AT&T Inc
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Filing: 1953-11-04
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Granted: 1959-09-01
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Expires: 1973-11-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Francis J Fuchs
- 👤 Nevrincean George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:08
CPC Classifications
B; B21; B21D; B21D11/00; B21D11/14; H; H01; H01P; H01P11/00; H01P11/001; H01P11/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US475181A
Cited
US757592A
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US1690724A
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US1687143A
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US1958982A
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US1826077A
Cited
US2039646A
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US2701002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |