US3377528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field-effect pressure transducer
Assignee: Siemens AG
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Filing: 1965-02-26
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Granted: 1968-04-09
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Expires: 1985-02-26
Abstract
No abstract record available.
Inventors
- 👤 Toussaint Hans-Norbert
- 👤 Krieger Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:20
CPC Classifications
H; H04; H04R; H04R23/00; H04R23/006; H03; H03F; H03F3/00; H03F3/04; H03F3/16; H03F3/165; H10; H10D; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
FIELD-EFFECT TRANSISTOR, COMPRISING A SEMICONDUCTOR BODY HAVING THREE REGIONS OF ALTERNATELY OPPOSED CONDUCTIVITY TYPE FORMING TWO PN JUNCTIONS THEREBETWEEN AND HAVING TWO TERMINAL ELECTRODES SPACED FROM EACH OTHER ON THE INTERMEDIATE ONE OF SAID REGIONS AND DEFINING BETWEEN EACH OTHER A CURRENT PATH HAVING A RESISTANCE DEPENDENT UPON SPACE CHARGES, AND MEANS FOR SUBJECTING SAID BODY TO VARIABLE PRESSURE, SAID MEANS COMPRISING AN ELECTRICALLY INSULATED HARD PRESSURE POINT IN PRESSURE ENGAGEMENT WITH SAID BODY IN A SPACE CHARGE REGION.
Claim 2
Dependent Claim
79 words
FIELD-EFFECT TRANSISTOR, COMPRISING A SEMICONDUCTOR BODY HAVING THREE REGIONS OF ALTERNATELY OPPOSED CONDUCTIVITY TYPE FORMING TWO PN JUNCTIONS THEREBETWEEN AND HAVING TWO TERMINAL ELECTRODES SPACED FROM EACH OTHER ON THE INTERMEDIATE ONE OF SAID REGIONS AND DEFINING BETWEEN EACH OTHER A CURRENT PATH HAVING A RESISTANCE DEPENDENT UPON SPACE CHARGES, AND MEANS FOR SUBJECTING SAID BODY TO VARIABLE PRESSURE, SAID MEANS COMPRISING AN ELECTRICALLY INSULATED HARD PRESSURE POINT IN PRESSURE ENGAGEMENT WITH SAID BODY IN A SPACE CHARGE REGION.
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) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |