US2540080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflex klystron electron discharge device
Assignee: GTE Sylvania Inc
•
Filing: 1948-06-22
•
Granted: 1951-02-06
•
Expires: 1968-06-22
Abstract
No abstract record available.
Inventors
- 👤 Janis Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:38
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/22; H01J25/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2463519A
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US2353743A
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US2391016A
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US2439387A
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US2400752A
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US2444749A
Cited
US2452062A
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US2442671A
Cited
US2421725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |