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US2487619A
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Electrical cavity resonator
Assignee: RCA Corp
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Filing: 1943-11-16
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Granted: 1949-11-08
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Expires: 1963-11-16
Abstract
No abstract record available.
Inventors
- 👤 George L Usselman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:14
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2044413A
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US2261130A
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US2406370A
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US2367576A
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US2404261A
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US2410109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |