Patent US2500863A successfully refreshed from Google Patents.
US2500863A
Expired / Lapsed
US
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Circuit for converting a voltage of given shape into a voltage of different shape
Assignee: Hartford National Bank and Trust Co
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Filing: 1946-11-22
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Granted: 1950-03-14
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Expires: 1966-11-22
Abstract
No abstract record available.
Inventors
- 👤 Posthumus Klaas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:29
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/02; H01F29/04; G; G01; G01R; G01R25/00; H03; H03K; H03K25/00; H03K7/00; H03K9/00; H03K9/04; H04; H04B; H04B14/00; H04B14/02
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) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |