Patent US2549782A successfully refreshed from Google Patents.
Patent US3335292A successfully refreshed from Google Patents.
US3335292A
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Voltage-responsive sequencing switch
Assignee: Individual
•
Filing: 1964-12-14
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Granted: 1967-08-08
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Expires: 1984-12-14
Abstract
No abstract record available.
Inventors
- 👤 James R Alburger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:47
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/34; H03M1/36; H03M1/361
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
AN ELECTRICAL SWITCHING CIRCUIT COMPRISING AN INPUT CONNECTED THROUGH BALLAST RESISTORS TO THE BASES OF A SERIES OF AT LEAST TWO TRANSISTORS HAVING THEIR EMITTERS SELECTIVELY CONNECTED TO FORWARD BIAS VOLTAGES IN ASCENDING VOLTAGE MAGNITUDES, AND HAVING THEIR COLLECTORS CONNECTED THROUGH BALLAST RESISTORS TO A SOURCE OF SUPPLY VOLTAGE, AND AT LEAST ONE OUTPUT TRANSISTOR SELECTIVELY CONNECTED BETWEEN PAIRS OF TRANSISTORS OF THE SAID SERIES, THE EMITTER OF SAID AT LEAST ONE OUTPUT TRANSISTOR BEING CONNECTED TO A COLLECTOR OF A TRANSISTOR OF THE SAID SERIES, AND THE BASE OF SAID AT LEAST ONE OUTPUT TRANSISTOR BEING CONNECTED THROUGH A BALLAST RESISTOR TO THE COLLECTOR OF A TRANSISTOR OF THE SAID SERIES HAVING A HIGHER FORWARD BIAS.
Claim 2
Dependent Claim
117 words
AN ELECTRICAL SWITCHING CIRCUIT COMPRISING AN INPUT CONNECTED THROUGH BALLAST RESISTORS TO THE BASES OF A SERIES OF AT LEAST TWO TRANSISTORS HAVING THEIR EMITTERS SELECTIVELY CONNECTED TO FORWARD BIAS VOLTAGES IN ASCENDING VOLTAGE MAGNITUDES, AND HAVING THEIR COLLECTORS CONNECTED THROUGH BALLAST RESISTORS TO A SOURCE OF SUPPLY VOLTAGE, AND AT LEAST ONE OUTPUT TRANSISTOR SELECTIVELY CONNECTED BETWEEN PAIRS OF TRANSISTORS OF THE SAID SERIES, THE EMITTER OF SAID AT LEAST ONE OUTPUT TRANSISTOR BEING CONNECTED TO A COLLECTOR OF A TRANSISTOR OF THE SAID SERIES, AND THE BASE OF SAID AT LEAST ONE OUTPUT TRANSISTOR BEING CONNECTED THROUGH A BALLAST RESISTOR TO THE COLLECTOR OF A TRANSISTOR OF THE SAID SERIES HAVING A HIGHER FORWARD BIAS.
References Cited (Backward Citations)
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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) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |