US2544664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency high-power tube
Assignee: RCA Corp
•
Filing: 1949-03-17
•
Granted: 1951-03-13
•
Expires: 1969-03-17
Abstract
No abstract record available.
Inventors
- 👤 Lloyd P Garner
- 👤 William N Parker
- 👤 Willis E Harbaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:24
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/02; H01J21/06; H01J21/065; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12229; Y10T428/12264; Y10T428/12361
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1572721A
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US1944190A
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US2130280A
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US2000567A
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US2160086A
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US2229957A
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US2312350A
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US2392379A
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US2451987A
Cited
US2440248A
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US2462569A
Cited
US2449256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |