Patent US2578699A successfully refreshed from Google Patents.
US2578699A
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Cavity resonator electron discharge apparatus
Assignee: Leland Stanford Junior University
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Filing: 1947-10-03
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Granted: 1951-12-18
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Expires: 1967-10-03
Abstract
No abstract record available.
Inventors
- 👤 William W Hansen
- 👤 Russell H Varian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:52
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/36; H01J25/00; H01J25/02; H01J25/10; H01J25/12; H01P; H01P1/00; H01P1/20; H01P1/213; H01P1/2138
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2106771A
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US2153728A
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US2222902A
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US2190668A
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US2237878A
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US2287845A
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US2259690A
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US8200023B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |