US2500944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency tube structure
Assignee: Unisys Corp
•
Filing: 1942-07-21
•
Granted: 1950-03-21
•
Expires: 1962-07-21
Abstract
No abstract record available.
Inventors
- 👤 William W Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:14
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)
US2242275A
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US2281935A
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US2245627A
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US2406370A
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US2280026A
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US2320860A
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US2317140A
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US2284405A
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US2381320A
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US2399223A
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US2408409A
Cited
US2407667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |