Patent US1953775A successfully refreshed from Google Patents.
US1953775A
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Circuits for relaying or amplifying direct or alternating current energy
Assignee: General Electric Co
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Filing: 1931-09-19
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Granted: 1934-04-03
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Expires: 1951-09-19
Abstract
No abstract record available.
Inventors
- 👤 Robinson Ernest Yeoman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:32
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/42; H03F1/48; H03F1/50
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) | 1937-04-02 | 1937-10-02 | 1938-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-04-02 | 1941-10-02 | 1942-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-04-02 | 1945-10-02 | 1946-04-03 | $7700.00 | Window Closed / Lapsed |