Patent US2156074A successfully refreshed from Google Patents.
US2156074A
Expired / Lapsed
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Energizing circuit for unilaterally conducting devices
Assignee: General Electric Co
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Filing: 1938-02-01
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Granted: 1939-04-25
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Expires: 1958-02-01
Abstract
No abstract record available.
Inventors
- 👤 Willem F Westendorp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:45
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/02; H01F38/04; H05; H05G; H05G1/00; H05G1/08; H05G1/10; H05G1/14; H05G1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-04-24 | 1942-10-24 | 1943-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-24 | 1946-10-24 | 1947-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-24 | 1950-10-24 | 1951-04-25 | $7700.00 | Window Closed / Lapsed |