Patent US2457806A successfully refreshed from Google Patents.
US2457806A
Expired / Lapsed
US
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Inductance coil
Assignee: Individual
•
Filing: 1946-06-11
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Granted: 1949-01-04
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Expires: 1966-06-11
Abstract
No abstract record available.
Inventors
- 👤 Eugene R Crippa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:02
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; H01F27/00; H01F27/24; H01F27/255
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-04 | 1952-07-05 | 1953-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-04 | 1956-07-05 | 1957-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-04 | 1960-07-05 | 1961-01-04 | $7700.00 | Window Closed / Lapsed |