US3142004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor timing device
Assignee: Individual
•
Filing: 1960-08-24
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Granted: 1964-07-21
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Expires: 1980-08-24
Abstract
No abstract record available.
Inventors
- 👤 George T Culbertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:39
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
138 words
A TIMING CIRCUIT COMPRISING A SOURCE OF SUPPLY VOLTAGE, A DOUBLE-BASE DIODE HAVING AN EMITTER, BASE ONE, AND BASE TWO ELECTRODE, SELECTIVE SWITCHING MEANS CONNECTING SAID SOURCE OF SUPPLY VOLTAGE ACROSS SAID BASE ONE AND BASE TWO ELECTRODES, A FIRST RESISTOR AND A CAPACITOR IN A CHARGING CIRCUIT ACROSS SAID SOURCE OF SUPPLY VOLTAGE, MEANS CONNECTING SAID CAPACITOR IN A DISCHARGE CIRCUIT INCLUDING A SECOND RESISTOR AND THE EMITTER AND BASE ONE ELECTRODE OF SAID DOUBLE-BASE DIODE, SAID SECOND RESISTOR ALSO BEING INCLUDED IN THE CHARGING CIRCUIT, SEMICONDUCTOR MEANS POLED TO SERVE AS A LOW IMPEDANCE BYPASSING SAID SECOND RESISTOR DURING CHARGING OF SAID CAPACITOR AND A HIGH IMPEDANCE PARALLELING SAID SECOND RESISTOR DURING DISCHARGE OF SAID CAPACITOR, AND OUTPUT TRANSISTOR MEANS TRIGGERED BY THE VOLTAGE GENERATED ACROSS SAID SECOND RESISTOR WHEN SAID DOUBLE-BASE DIODE IS RENDERED CONDUCTING.
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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |