US2623129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic tube for amplification of ultrashort electric waves
Assignee: Thales SA
•
Filing: 1949-05-25
•
Granted: 1952-12-23
•
Expires: 1969-05-25
Abstract
No abstract record available.
Inventors
- 👤 Lerbs Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:23
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1877872A
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US2122538A
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US2241976A
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US2300052A
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US2402184A
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US2439401A
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US2511407A
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US2541843A
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US2516944A
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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) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |