Patent US2336191A successfully refreshed from Google Patents.
Patent US3189756A successfully refreshed from Google Patents.
US3189756A
Expired / Lapsed
US
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Waveform generator
Assignee: Lanteris Space LLC
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Filing: 1961-10-19
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Granted: 1965-06-15
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Expires: 1981-10-19
Abstract
No abstract record available.
Inventors
- 👤 Hopengarten Abram
- 👤 Paul G Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:40
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/60; H03K4/69; H03K4/72; H03K5/00; H03K5/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A WAVEFORM GENERATOR COMPRISING: A TRANSISTOR HAVING AN EMITTER, A COLLECTOR AND A BASE, THE BASE-EMITTER PATH OF SAID TRANSISTOR HAVING A RESISTANCE WHICH CHANGES IN RESPONSE TO A CHANGING FORWARD-BIASING VOLTAGE APPLIED BETWEEN SAID EMITTER AND SAID BASE AND A CURRENT GAIN WHICH CHANGES IN RESPONSE TO A CHANGE IN THE COLLECTOR CURRENT OF SAID TRANSISTOR, A DIRECT-CURRENT-CONDUCTIVE IMPEDANCE ELEMENT, MEANS CONNECTING SAID IMPEDANCE ELEMENT BETWEEN SAID EMITTER AND SAID BASE, A REACTIVE ELEMENT, A SWITCH AND MEANS FOR SUPPLYING A UNIDIRECTIONAL VOLTAGE, MEANS CONNECTING SAID IMPEDANCE ELEMENT, SAID SWITCH, SAID REACTIVE ELEMENT, AND SAID VOLTAGE-SUPPLYING MEANS IN SERIES RELATIONSHIP, AND A LOAD COUPLED TO THE EMITTER-COLLECTOR PATH OF SAID TRANSISTOR, SAID UNDIRECTIONAL VOLTAGE HAVING SUCH POLARITY AS OF TO SUPPLY TO SAID IMPEDANCE ELEMENT, UPON CLOSURE OF SAID SWITCH, A FIRST CURRENT PORTION SENSED TO DEVELOP ACROSS SAID IMPEDANCE ELEMENT A VOLTAGE WHICH FORWARD-BIASES SAID BASE-EMITTER PATH OF SAID TRANSISTOR, THEREBY ENABLING A SECOND CUR-
Claim 2
Dependent Claim
157 words
A WAVEFORM GENERATOR COMPRISING: A TRANSISTOR HAVING AN EMITTER, A COLLECTOR AND A BASE, THE BASE-EMITTER PATH OF SAID TRANSISTOR HAVING A RESISTANCE WHICH CHANGES IN RESPONSE TO A CHANGING FORWARD-BIASING VOLTAGE APPLIED BETWEEN SAID EMITTER AND SAID BASE AND A CURRENT GAIN WHICH CHANGES IN RESPONSE TO A CHANGE IN THE COLLECTOR CURRENT OF SAID TRANSISTOR, A DIRECT-CURRENT-CONDUCTIVE IMPEDANCE ELEMENT, MEANS CONNECTING SAID IMPEDANCE ELEMENT BETWEEN SAID EMITTER AND SAID BASE, A REACTIVE ELEMENT, A SWITCH AND MEANS FOR SUPPLYING A UNIDIRECTIONAL VOLTAGE, MEANS CONNECTING SAID IMPEDANCE ELEMENT, SAID SWITCH, SAID REACTIVE ELEMENT, AND SAID VOLTAGE-SUPPLYING MEANS IN SERIES RELATIONSHIP, AND A LOAD COUPLED TO THE EMITTER-COLLECTOR PATH OF SAID TRANSISTOR, SAID UNDIRECTIONAL VOLTAGE HAVING SUCH POLARITY AS OF TO SUPPLY TO SAID IMPEDANCE ELEMENT, UPON CLOSURE OF SAID SWITCH, A FIRST CURRENT PORTION SENSED TO DEVELOP ACROSS SAID IMPEDANCE ELEMENT A VOLTAGE WHICH FORWARD-BIASES SAID BASE-EMITTER PATH OF SAID TRANSISTOR, THEREBY ENABLING A SECOND CUR-
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) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |