Patent US3239775A successfully refreshed from Google Patents.
US3239775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse generator having a back diode and a tunnel diode
Assignee: General Precision Inc
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Filing: 1963-11-12
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Granted: 1966-03-08
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Expires: 1983-11-12
Abstract
No abstract record available.
Inventors
- 👤 Putterman Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:00
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/313; H03K3/315
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A PULSE GENERATING CIRCUIT COMPRISING A SINGLE STAGE INCLUDING A TRANSISTOR HAVING A BASE, EMITTER AND COLLECTOR, A VOLTAGE SOURCE PRODUCING A FIRST POTENTIAL AND A SECOND POTENTIAL, A BACK DIODE COUPLED BETWEEN THE BASE OF SAID TRANSISTOR AND SAID SECOND POTENTIAL, A TUNNEL DIODE COUPLED BETWEEN THE EMITTER OF SAID TRANSISTOR AND SAID SECOND POTENTIAL, A VARIABLE RESISTOR COUPLED BETWEEN THE BASE OF SAID TRANSISTOR AND SAID FIRST POTENTIAL, AND A FIXED RESISTOR COUPLED BETWEEN THE COLLECTOR OF SAID TRANSISTOR AND SAID FIRST POTENTIAL, WHEREIN SAID TRANSISTOR IS CAUSED TO CONTINOUSLY ALTERNATE BETWEEN ITS ON AND OFF CONDITIONS UPON THE BREAKDOWN OF SAID BACK DIODE, AND UPON THE CHANGE OF SAID TUNNEL DIODE FROM ITS LOW VOLTAGE STATE TO ITS HIGH VOLTAGE STATE, RESPECTIVELY.
Claim 2
Dependent Claim
125 words
A PULSE GENERATING CIRCUIT COMPRISING A SINGLE STAGE INCLUDING A TRANSISTOR HAVING A BASE, EMITTER AND COLLECTOR, A VOLTAGE SOURCE PRODUCING A FIRST POTENTIAL AND A SECOND POTENTIAL, A BACK DIODE COUPLED BETWEEN THE BASE OF SAID TRANSISTOR AND SAID SECOND POTENTIAL, A TUNNEL DIODE COUPLED BETWEEN THE EMITTER OF SAID TRANSISTOR AND SAID SECOND POTENTIAL, A VARIABLE RESISTOR COUPLED BETWEEN THE BASE OF SAID TRANSISTOR AND SAID FIRST POTENTIAL, AND A FIXED RESISTOR COUPLED BETWEEN THE COLLECTOR OF SAID TRANSISTOR AND SAID FIRST POTENTIAL, WHEREIN SAID TRANSISTOR IS CAUSED TO CONTINOUSLY ALTERNATE BETWEEN ITS ON AND OFF CONDITIONS UPON THE BREAKDOWN OF SAID BACK DIODE, AND UPON THE CHANGE OF SAID TUNNEL DIODE FROM ITS LOW VOLTAGE STATE TO ITS HIGH VOLTAGE STATE, RESPECTIVELY.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |