US3229225A
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Assignee: Electrodynamics Inc
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Filing: 1962-01-29
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Granted: 1966-01-11
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Expires: 1982-01-29
Abstract
No abstract record available.
Inventors
- 👤 Richard G Schimpf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:15
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/14; G04C13/00; G04C13/08; G04C13/10; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1553; Y10T74/1555
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PULSE GENERATOR COMPRISING: A SOURCE OF DIRECTCURRENT HAVING FIRST AND SECOND OUTPUT LEADS; A FIRST TRANSISTOR HAVING A BASE AND HAVING A COLLECTOR-EMITTER CIRCUIT CONNECTED SERIALLY WITH SAID FIRST LEAD; A SECOND TRANSISTOR OF A CONDUCTIVITY TYPE OPPOSITE THAT OF SAID FIRST TRANSISTOR, SAID SECOND TRANSISTOR HAVING A BASE AND HAVING A COLLECTOR-EMITTER CIRCUIT CONNECTED BETWEEN SAID SECOND LEAD AND SAID FIRST TRANSISTOR BASE; A FIRST RESISTOR CONNECTED FROM SAID FIRST LEAD; A SECOND RESISTOR CONNECTED FROM SAID SECOND LEAD; A CAPACITOR CONNECTED FROM SAID FIRST RESISTOR AT A FIRST JUNCTION TO SAID SECOND RESISTOR AT A SECOND JUNCTION; A DIODE CONNECTED FROM SAID FIRST JUNCTION TO SAID BASE OF SAID SECOND TRANSISTOR; AND A TEMPERATURE COMPENSATION NETWORK CONNECTED FROM SAID COLLECTOR OF SAID FIRST TRANSISTOR TO SAID SECOND JUNCTION.
Claim 2
Dependent Claim
131 words
A PULSE GENERATOR COMPRISING: A SOURCE OF DIRECTCURRENT HAVING FIRST AND SECOND OUTPUT LEADS; A FIRST TRANSISTOR HAVING A BASE AND HAVING A COLLECTOR-EMITTER CIRCUIT CONNECTED SERIALLY WITH SAID FIRST LEAD; A SECOND TRANSISTOR OF A CONDUCTIVITY TYPE OPPOSITE THAT OF SAID FIRST TRANSISTOR, SAID SECOND TRANSISTOR HAVING A BASE AND HAVING A COLLECTOR-EMITTER CIRCUIT CONNECTED BETWEEN SAID SECOND LEAD AND SAID FIRST TRANSISTOR BASE; A FIRST RESISTOR CONNECTED FROM SAID FIRST LEAD; A SECOND RESISTOR CONNECTED FROM SAID SECOND LEAD; A CAPACITOR CONNECTED FROM SAID FIRST RESISTOR AT A FIRST JUNCTION TO SAID SECOND RESISTOR AT A SECOND JUNCTION; A DIODE CONNECTED FROM SAID FIRST JUNCTION TO SAID BASE OF SAID SECOND TRANSISTOR; AND A TEMPERATURE COMPENSATION NETWORK CONNECTED FROM SAID COLLECTOR OF SAID FIRST TRANSISTOR TO SAID SECOND JUNCTION.
References Cited (Backward Citations)
US2527420A
Cited
US2831113A
Cited
US2901639A
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US3058362A
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US2976470A
Cited
US3064175A
Cited
US3041478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |