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US2490845A
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High-frequency cavity resonator apparatus
Assignee: Unisys Corp
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Filing: 1945-01-20
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Granted: 1949-12-13
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Expires: 1965-01-20
Abstract
No abstract record available.
Inventors
- 👤 Lloyd F Sorg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:16
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/36; H01J23/40; H01J23/46; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44966; Y10T24/44974
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2281550A
Cited
US2244960A
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US2304186A
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US2263184A
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US2281717A
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US2330072A
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US2311520A
Cited
US2408271A
Cited
US2404086A
Cited
US2419572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |