US2531623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency electronic discharge device
Assignee: AT&T Inc
•
Filing: 1948-10-16
•
Granted: 1950-11-28
•
Expires: 1968-10-16
Abstract
No abstract record available.
Inventors
- 👤 Douglas A S Hale
- 👤 Reymond J Kircher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:30
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/02; H01J21/06; H01J21/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1486221A
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US2130281A
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US2153728A
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US2243537A
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US2399223A
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US2428609A
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US2402119A
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US2460120A
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US2515267A
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US2461303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |