Patent US2748353A successfully refreshed from Google Patents.
US2748353A
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Non-recirpocal wave guide attenuator
Assignee: AT&T Inc
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Filing: 1951-10-22
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Granted: 1956-05-29
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Expires: 1971-10-22
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Hogan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:40
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/165; H01P1/175; H03; H03H; H03H7/00; H03H7/002
Claims Analysis
Total Claims: 0
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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) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |