US2423443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High power electronic discharge device for generating ultra high frequency radiations
Assignee: AT&T Inc
•
Filing: 1942-12-31
•
Granted: 1947-07-08
•
Expires: 1962-12-31
Abstract
No abstract record available.
Inventors
- 👤 Clifford E Fay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:48
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/78; H01J19/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB269169A
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US1979668A
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US2044369A
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US2063341A
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US2167201A
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US2170653A
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US2163244A
Cited
US2108539A
Cited
US2163247A
Cited
US2186127A
Cited
US2228939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-07 | 1951-01-06 | 1951-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-07 | 1955-01-06 | 1955-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-07 | 1959-01-06 | 1959-07-08 | $7700.00 | Window Closed / Lapsed |