US2573190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra high-frequency electron tube
Assignee: Varian Medical Systems Inc
•
Filing: 1949-04-08
•
Granted: 1951-10-30
•
Expires: 1969-04-08
Abstract
No abstract record available.
Inventors
- 👤 William W Eitel
- 👤 Jack A Mccullough
- 👤 Harold E Sorg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:24
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/02; H01J21/06; H01J21/065; Y; Y10; Y10S; Y10S228/00; Y10S228/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2202487A
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US2407274A
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GB590519A
Cited
US2471037A
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US2504504A
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US2436649A
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US2443444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |