Patent US2979679A successfully refreshed from Google Patents.
US2979679A
Expired / Lapsed
US
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Apparatus of the kind including a waveguide
Assignee: The General Electric Company PLC
•
Filing: 1956-08-31
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Granted: 1961-04-11
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Expires: 1976-08-31
Abstract
No abstract record available.
Inventors
- 👤 Ellis Lester Beresford Derek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:49
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/001; H01P; H01P1/00; H01P1/16; H01P1/161; H01Q13/00; H01Q13/02; H01Q13/025; H01Q13/0258
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) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |