US2803804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable inductance tuner for constant bandwidth tuning
Assignee: —
•
Filing: —
•
Granted: 1957-08-20
•
Expires: 1974-08-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:18
CPC Classifications
H; H03; H03J; H03J3/00; H03J3/02; H03J3/06; H01; H01F; H01F21/00; H01F21/02; H01F21/06; H01F21/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2693581A
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US2627579A
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US2513392A
Cited
US2513393A
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US2715211A
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US2629081A
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US2543560A
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US2709788A
Cited
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 |