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Patent US2666905A successfully refreshed from Google Patents.
US2666905A
Expired / Lapsed
US
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Tuning device
Assignee: Triplett Electrical Instrument Co
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Filing: 1950-06-24
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Granted: 1954-01-19
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Expires: 1970-06-24
Abstract
No abstract record available.
Inventors
- 👤 Carl F Gerlach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:10
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/02; H01F21/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL31773C
Cited
US1158123A
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CH93679A
Cited
US1668414A
Cited
US1936671A
Cited
FR728756A
Cited
US1977291A
Cited
US2223080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |