US3025478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave devices for waveguides of circular cross section
Assignee: AT&T Inc
•
Filing: 1959-05-27
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Granted: 1962-03-13
•
Expires: 1979-05-27
Abstract
No abstract record available.
Inventors
- 👤 Enrique A J Marcatili
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:50
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/16; H01P1/163
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2736866A
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US2737630A
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US2738468A
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US2767380A
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US2851665A
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US2853682A
Cited
US2850626A
Cited
US2950452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |