US2803745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrahigh-frequency tunable structure and circuit
Assignee: RCA Corp
•
Filing: 1953-07-01
•
Granted: 1957-08-20
•
Expires: 1973-07-01
Abstract
No abstract record available.
Inventors
- 👤 Pan Wen Yuan
- 👤 David J Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:23
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/89; G01N21/8901; H; H03; H03J; H03J3/00; H03J3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2563413A
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US2272062A
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US2341345A
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US2344689A
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US2422454A
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US2711477A
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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) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |