Patent US2576181A successfully refreshed from Google Patents.
US2576181A
Expired / Lapsed
US
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Focusing device for centimeter waves
Assignee: RCA Corp
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Filing: 1947-10-28
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Granted: 1951-11-27
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Expires: 1967-10-28
Abstract
No abstract record available.
Inventors
- 👤 Iams Harley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:17
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/12; H01Q3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2247969A
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US2273447A
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US2460401A
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US2464269A
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US2407318A
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US2438343A
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US2419556A
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US2415352A
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US2433924A
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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) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |