Patent US2754431A successfully refreshed from Google Patents.
US2754431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor devices
Assignee: RCA Corp
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Filing: 1953-03-09
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Granted: 1956-07-10
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Expires: 1973-03-09
Abstract
No abstract record available.
Inventors
- 👤 Johnson Harwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:03
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/14; H03D; H03D13/00; H10; H10D; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
AN ELECTRICAL DEVICE COMPRISING A BODY OF SEMICONDUCTOR MATERIAL, EMITTER AND COLLECTOR ELECTRODES IN CONTACT WITH SAID BODY, A BASE ELECTRODE ALSO IN CONTACT WITH SAID BODY SUCH THAT A CURRENT PATH IS DEFINED BETWEEN SAID BASE ELECTRODE AND ONE OF SAID EMITTER OR COLLECTOR ELECTRODES, AND MEANS FOR VARYING THE EFFECTIVE RESISTANCE OF A PORTION OF SAID BODY WITHIN SAID CURRENT PATH, SAID MEANS COMPRISING A P-N RECTIFYING JUNCTION ELECTRODE DISPOSED ADJACENT SAID PATH, AND MEANS FOR BIASING SAID JUNCTION ELECTRODE IN A PARTICULAR DIRECTION WITH RESPECT TO SAID BODY.
Claim 2
Dependent Claim
91 words
AN ELECTRICAL DEVICE COMPRISING A BODY OF SEMICONDUCTOR MATERIAL, EMITTER AND COLLECTOR ELECTRODES IN CONTACT WITH SAID BODY, A BASE ELECTRODE ALSO IN CONTACT WITH SAID BODY SUCH THAT A CURRENT PATH IS DEFINED BETWEEN SAID BASE ELECTRODE AND ONE OF SAID EMITTER OR COLLECTOR ELECTRODES, AND MEANS FOR VARYING THE EFFECTIVE RESISTANCE OF A PORTION OF SAID BODY WITHIN SAID CURRENT PATH, SAID MEANS COMPRISING A P-N RECTIFYING JUNCTION ELECTRODE DISPOSED ADJACENT SAID PATH, AND MEANS FOR BIASING SAID JUNCTION ELECTRODE IN A PARTICULAR DIRECTION WITH RESPECT TO SAID BODY.
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) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |