US2454560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra high frequency electric discharge device
Assignee: General Electric Co
•
Filing: 1942-10-02
•
Granted: 1948-11-23
•
Expires: 1962-10-02
Abstract
No abstract record available.
Inventors
- 👤 James M Lafferty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:09
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/78; H01J19/80; H01P; H01P5/00; H01P5/04; H01P7/00; H01P7/06; H03; H03C; H03C7/00; H03C7/02; H03D; H03D1/00; H03D1/08; H03F; H03F3/00; H03F3/54
Claims Analysis
Total Claims: 0
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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) | 1951-11-23 | 1952-05-24 | 1952-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-23 | 1956-05-24 | 1956-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-23 | 1960-05-24 | 1960-11-23 | $7700.00 | Window Closed / Lapsed |