US2654045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic cathode for electric discharge device
Assignee: General Electric Co
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Filing: 1952-01-08
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Granted: 1953-09-29
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Expires: 1972-01-08
Abstract
No abstract record available.
Inventors
- 👤 Wright Donald Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:07
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/06; H01J61/067; H01J61/0675; H01J61/0677; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/937; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12069; Y10T428/12076; Y10T428/12104; Y10T428/12111; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12812; Y10T428/12819; Y10T428/12826; Y10T428/12986
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2249672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |