Patent US2546628A successfully refreshed from Google Patents.
US2546628A
Expired / Lapsed
US
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Electronic amplifier for threephase current impulses
Assignee: C ELECTRONICS DEVELOPMENTS Ltd
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Filing: 1948-06-14
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Granted: 1951-03-27
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Expires: 1968-06-14
Abstract
No abstract record available.
Inventors
- 👤 Briggs George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:52
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/121; G05D3/122; G08; G08C; G08C19/00; G08C19/38; G08C19/46; G08C19/48; H; H03; H03F; H03F1/00; H03F1/34; H03F1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR573706A
Cited
US1898366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |