US3218508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage power supply
Assignee: Varian Medical Systems Inc
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Filing: 1962-04-10
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Granted: 1965-11-16
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Expires: 1982-04-10
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Holce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:22
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN AN ELECTRONIC CIRCUIT INCLUDING A PLURALITY OF ELECTRON DISCHARGE DEVICES EACH OPERABLE BY A HEATED FILAMENT, MEANS PROVIDING ELECTRIC ENERGY TO SAID HEATED FILAMENTS, COMPRISING A RESONANT CIRCUIT CONNECTED TO EACH FILAMENT, A SOURCE OF ELECTRIC FILAMENT ENERGY COMPRISING A HIGH FREQUENCY OSCILLATOR INCLUDING A TANK COIL, AND MEANS SUPPORTING THE TANK COIL IN A POSITION SURROUNDING ALL OF SAID
Claim 2
Dependent Claim
61 words
IN AN ELECTRONIC CIRCUIT INCLUDING A PLURALITY OF ELECTRON DISCHARGE DEVICES EACH OPERABLE BY A HEATED FILAMENT, MEANS PROVIDING ELECTRIC ENERGY TO SAID HEATED FILAMENTS, COMPRISING A RESONANT CIRCUIT CONNECTED TO EACH FILAMENT, A SOURCE OF ELECTRIC FILAMENT ENERGY COMPRISING A HIGH FREQUENCY OSCILLATOR INCLUDING A TANK COIL, AND MEANS SUPPORTING THE TANK COIL IN A POSITION SURROUNDING ALL OF SAID
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |