US3219837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Negative resistance transistors
Assignee: Sanyo Electric Co Ltd
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Filing: 1961-02-23
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Granted: 1965-11-23
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Expires: 1981-02-23
Abstract
No abstract record available.
Inventors
- 👤 Nakahara Osamu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:15
CPC Classifications
H; H10; H10D; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A TRANSISTOR EXHIBITIG NEGATIVE RESISTANCE EFFECTES INDEPENDENT OF AVALANCHE MECHANISM AND ADAPTED TO BE ENEERGIZED BY A SOURCE, SADI TRANSISTOR COMPRISING AN EMITTER AND A COLLECTOR OF SEMI-CONDUCTIVE MATIERAL OF ONE CONDUCITVITY TYPE UPON THE OPPOSITE FACES RESPECTIVELY OF A BASE OF SEMI-CONDUCTIVE MATIERAL OF THE OPPOSITE CONDUCTIVITY TYPE, THE EFFECTIVE JUNCION AREA OF SAID EMITTER BEING SMALLER THAN THAT OF SAID COLLECTOR WHEREBY A SECTION OF SAI BASE IS EXTERNAL TO THE BASE REGION COMMON TO BOTH COLLECTOR AND EMITER, SAID EXTERNAL SECTION OF SAID BASE HAVING MEANS INCLUDING A PORTION MADE OF SEMICONDUCTIVE MATERIAL HAVING A RELATIVELY HIGH RESISTIVITY FOR CAUSING MODULATION OF BASE RESISTIVITY BY COLLECTOR VOLTAGE IN THE SATUREATION REGION TO A DEGREE SUFFICIENT TO PRODUCE IN THE REGION OF SATUREATION A DECREASING COLLECTOR CURRENT AS COLECTOR VLTAGE IS INCREASED WHEREBY A NEGATIVE RESISTANCE EFFECT OBTAINS.
Claim 2
Dependent Claim
140 words
A TRANSISTOR EXHIBITIG NEGATIVE RESISTANCE EFFECTES INDEPENDENT OF AVALANCHE MECHANISM AND ADAPTED TO BE ENEERGIZED BY A SOURCE, SADI TRANSISTOR COMPRISING AN EMITTER AND A COLLECTOR OF SEMI-CONDUCTIVE MATIERAL OF ONE CONDUCITVITY TYPE UPON THE OPPOSITE FACES RESPECTIVELY OF A BASE OF SEMI-CONDUCTIVE MATIERAL OF THE OPPOSITE CONDUCTIVITY TYPE, THE EFFECTIVE JUNCION AREA OF SAID EMITTER BEING SMALLER THAN THAT OF SAID COLLECTOR WHEREBY A SECTION OF SAI BASE IS EXTERNAL TO THE BASE REGION COMMON TO BOTH COLLECTOR AND EMITER, SAID EXTERNAL SECTION OF SAID BASE HAVING MEANS INCLUDING A PORTION MADE OF SEMICONDUCTIVE MATERIAL HAVING A RELATIVELY HIGH RESISTIVITY FOR CAUSING MODULATION OF BASE RESISTIVITY BY COLLECTOR VOLTAGE IN THE SATUREATION REGION TO A DEGREE SUFFICIENT TO PRODUCE IN THE REGION OF SATUREATION A DECREASING COLLECTOR CURRENT AS COLECTOR VLTAGE IS INCREASED WHEREBY A NEGATIVE RESISTANCE EFFECT OBTAINS.
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |