Patent US2618582A successfully refreshed from Google Patents.
Patent US2459894A successfully refreshed from Google Patents.
US2459894A
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Electrical coil and a method of making such
Assignee: AT&T Inc
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Filing: 1945-01-11
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Granted: 1949-01-25
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Expires: 1965-01-11
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:56
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/362; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902
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) | 1952-01-25 | 1952-07-26 | 1953-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-25 | 1956-07-26 | 1957-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-25 | 1960-07-26 | 1961-01-25 | $7700.00 | Window Closed / Lapsed |