US2475652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency tube structure
Assignee: Unisys Corp
•
Filing: 1942-08-03
•
Granted: 1949-07-12
•
Expires: 1962-08-03
Abstract
No abstract record available.
Inventors
- 👤 Sigurd F Varian
- 👤 Edward L Ginzton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:38
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/10; H01J25/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2242249A
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US2245627A
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US2406370A
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US2216170A
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US2280026A
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US2304186A
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US2308523A
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US2372193A
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US2314794A
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US2311658A
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US2309966A
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US2289952A
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US2396802A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-11 | 1953-01-10 | 1953-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-11 | 1957-01-10 | 1957-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-11 | 1961-01-10 | 1961-07-12 | $7700.00 | Window Closed / Lapsed |