US2497456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable inductance device or the like
Assignee: PALNUT Co
•
Filing: 1944-11-23
•
Granted: 1950-02-14
•
Expires: 1964-11-23
Abstract
No abstract record available.
Inventors
- 👤 Edward L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:56
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/02; H01F21/06; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19805; Y10T74/19809; Y10T74/19814
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US832723A
Cited
US822099A
Cited
US933580A
Cited
US2149848A
Cited
US2258652A
Cited
US2335205A
Cited
US2386732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |