US2678407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron-discharge device
Assignee: Raytheon Co
•
Filing: 1950-01-04
•
Granted: 1954-05-11
•
Expires: 1970-01-04
Abstract
No abstract record available.
Inventors
- 👤 William C Brown
- 👤 Winston M Gottschalk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:03
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/50; H01J25/52; H01J25/54; H01J25/55
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2444419A
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US2446825A
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US2446826A
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US2492313A
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US2414085A
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US2480999A
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US2502405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |