US3105196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor and tube gating circuit
Assignee: General Precision Inc
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Filing: 1959-12-21
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Granted: 1963-09-24
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Expires: 1979-12-21
Abstract
No abstract record available.
Inventors
- 👤 Lerner Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:25
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
AN ELECTRIC CIRCUIT, COMPRISING, AN ELECTRON TUBE HAVING A CATHODE, AN ANODE AND A CONTROL ELECTRODE, AN IMPEDANCE CONNECTED BETWEEN SAID ANODE AND A SOURCE OF POSITIVE POTENTIAL, A TRANSISTOR HAVING A COLLECTOR, AN EMITTER AND A BASE, MEANS FOR BIASING SAID CONTROL ELECTRODE, SAID EMITTER AND SAID BASE AT THE SAME POTENTIAL, AND A DIRECT CONNECTION BETWEEN SAID COLLECTOR AND SAID CATHODE, WHEREBY POTENTIAL VARIATIONS OF SAID BASE CAUSE VARIATIONS IN THE CONDUCTIVITY OF SAID TRANSISTOR AND SAID TUBE.
Claim 2
Dependent Claim
80 words
AN ELECTRIC CIRCUIT, COMPRISING, AN ELECTRON TUBE HAVING A CATHODE, AN ANODE AND A CONTROL ELECTRODE, AN IMPEDANCE CONNECTED BETWEEN SAID ANODE AND A SOURCE OF POSITIVE POTENTIAL, A TRANSISTOR HAVING A COLLECTOR, AN EMITTER AND A BASE, MEANS FOR BIASING SAID CONTROL ELECTRODE, SAID EMITTER AND SAID BASE AT THE SAME POTENTIAL, AND A DIRECT CONNECTION BETWEEN SAID COLLECTOR AND SAID CATHODE, WHEREBY POTENTIAL VARIATIONS OF SAID BASE CAUSE VARIATIONS IN THE CONDUCTIVITY OF SAID TRANSISTOR AND SAID TUBE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |