US2807744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Travelling wave magnetron tubes
Assignee: Thales SA
•
Filing: 1952-07-11
•
Granted: 1957-09-24
•
Expires: 1972-07-11
Abstract
No abstract record available.
Inventors
- 👤 Lerbs Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:08
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/42; H01J25/44; H03; H03B; H03B19/00; H03B19/06; H03B19/08; H03B19/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2680823A
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US2695929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |