Patent US2681999A successfully refreshed from Google Patents.
US2681999A
Expired / Lapsed
US
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Coaxial resonant circuit
Assignee: Individual
•
Filing: 1945-10-25
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Granted: 1954-06-22
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Expires: 1965-10-25
Abstract
No abstract record available.
Inventors
- 👤 Lawrence W Boothby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:14
CPC Classifications
H; H03; H03H; H03H5/00; H03H5/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1441212A
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US1651975A
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US1715880A
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US1955093A
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US1921448A
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US1919215A
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US2110179A
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US2189284A
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US2232591A
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US2483893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |