US2938180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of electrically controllable variable inductor for tuning purposes
Assignee: Individual
•
Filing: 1958-05-20
•
Granted: 1960-05-24
•
Expires: 1978-05-20
Abstract
No abstract record available.
Inventors
- 👤 Witz Gerhard H De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:42
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/02; H01F21/08; H01F29/00; H01F29/14; H01F29/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2803804A
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US1853969A
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US2055996A
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US2052703A
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US2051364A
Cited
US2569309A
Cited
US2661459A
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US2820109A
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US2708219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |