Patent US2493842A successfully refreshed from Google Patents.
US2493842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave guide with phase compensating paired bends
Assignee: AT&T Inc
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Filing: 1944-01-25
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Granted: 1950-01-10
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Expires: 1964-01-25
Abstract
No abstract record available.
Inventors
- 👤 Warren A Tyrrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:59
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2129712A
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US2206923A
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US2129669A
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US2398095A
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US2412320A
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US2416675A
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US2407305A
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US2410827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |