Patent EP0347779A2 successfully refreshed from Google Patents.
US3051908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slow-wave broadband nonreciprocal microwave devices
Assignee: AT&T Inc
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Filing: 1960-02-03
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Granted: 1962-08-28
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Expires: 1980-02-03
Abstract
No abstract record available.
Inventors
- 👤 William W Anderson
- 👤 Marion E Hines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:21
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/32; H01P1/36; H01P1/365
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2899652A
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US2540488A
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US2777906A
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BE542862A
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US2903656A
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US2924794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |