Patent US4568955A successfully refreshed from Google Patents.
Patent US2556094A successfully refreshed from Google Patents.
US2556094A
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High-frequency apparatus
Assignee: RCA Corp
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Filing: 1946-09-24
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Granted: 1951-06-05
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Expires: 1966-09-24
Abstract
No abstract record available.
Inventors
- 👤 Nils E Lindenblad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:10
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/08; H01Q; H01Q21/00; H01Q21/06; H01Q21/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-04 | 1954-12-04 | 1955-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-04 | 1958-12-04 | 1959-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-04 | 1962-12-04 | 1963-06-05 | $7700.00 | Window Closed / Lapsed |