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US2680830A
Expired / Lapsed
US
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Series-resonant high-voltage supply
Assignee: United States Department of Commerce
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Filing: 1953-04-28
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Granted: 1954-06-08
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Expires: 1973-04-28
Abstract
No abstract record available.
Inventors
- 👤 Peter G Sulzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:33
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04
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) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |