Patent US2537807A successfully refreshed from Google Patents.
US2537807A
Expired / Lapsed
US
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Thermionic amplifier
Assignee: JOHN LOGIE BAIRD Ltd
•
Filing: 1948-02-17
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Granted: 1951-01-09
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Expires: 1968-02-17
Abstract
No abstract record available.
Inventors
- 👤 Anderson Edward George Orme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:57
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N5/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1923252A
Cited
US1479779A
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US1997665A
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US2134094A
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US2214019A
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US2214614A
Cited
US2280670A
Cited
US2369631A
Cited
US2434295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |