Patent US2697799A successfully refreshed from Google Patents.
US2697799A
Expired / Lapsed
US
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Amplifying device for microwaves
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1948-12-01
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Granted: 1954-12-21
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Expires: 1968-12-01
Abstract
No abstract record available.
Inventors
- 👤 Svensson Regnar Holmfrid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:47
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/42; H01J25/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2013773A
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US2122538A
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US2289756A
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US2241976A
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US2300052A
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US2414121A
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US2428612A
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US2582185A
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US2511407A
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US2566087A
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US2600509A
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US2559581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |