Patent US2784367A successfully refreshed from Google Patents.
US2784367A
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Circuit-arrangement for producing direct voltages
Assignee: Hartford National Bank and Trust Co
•
Filing: 1952-08-16
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Granted: 1957-03-05
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Expires: 1972-08-16
Abstract
No abstract record available.
Inventors
- 👤 Polder Leendert Johan Van De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:17
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/33; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/52; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/18; H04N3/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1845151A
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US2019352A
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US2157977A
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US2475063A
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US2591942A
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US2565621A
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US2555449A
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US2573280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |