Patent US3940134A successfully refreshed from Google Patents.
US3153752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field-effect tubular transistor
Assignee: Individual
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Filing: 1961-02-10
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Granted: 1964-10-20
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Expires: 1981-02-10
Abstract
No abstract record available.
Inventors
- 👤 Teszner Stanislas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:04
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/353; H10; H10D; H10D30/00; H10D30/80; H10D30/87; H10D30/871; H10D62/00; H10D62/10; H10D62/117; H10P; H10P95/00; H10W; H10W72/00; H10W72/20; H10W90/00; H10W90/701; H10W90/751; H10W90/753; H10W90/754; Y; Y10; Y10S; Y10S148/00; Y10S148/053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A FIELD-EFFECT CENTRIPETAL PINCH-OFF SEMICONDUCTOR DEVICE COMPRISING A TUBULAR BODY CONSISTING OF A SEMICONDUCTOR MATERIAL, A HOLLOWED-OUT THROAT FORMED BETWEEN THE ENDS OF THE BODY IN THE OUTER SURFACE OF AND EXTENDING CONTINUOUSLY AROUND SAID BODY, SAID HOLLOWED THROAT HAVING A PREDETERMINED AXIAL LENGTH, A METALLIC GATE ELECTRODE IN SAID HOLLOWED THROAT MAKING A RECTIFYING CONTACT WITH SAID TUBULAR BODY AND HAVING AN AXIAL LENGTH WHICH IS LESS THAN THE AXIAL LENGTH OF SAID HOLLOWED THROAT, METALLIC ELECTRODES ON THE ANNULAR END FACES OF SAID TUBULAR BODY WHICH MAKES OHMIC CONTACT THERETO AND A SATURATED OXIDE LAYER ON THE INTERIOR SURFACE OF THE TUBULAR BODY ALONG A SURFACE WHICH IS OPPOSITE SAID THROAT.
Claim 2
Dependent Claim
113 words
A FIELD-EFFECT CENTRIPETAL PINCH-OFF SEMICONDUCTOR DEVICE COMPRISING A TUBULAR BODY CONSISTING OF A SEMICONDUCTOR MATERIAL, A HOLLOWED-OUT THROAT FORMED BETWEEN THE ENDS OF THE BODY IN THE OUTER SURFACE OF AND EXTENDING CONTINUOUSLY AROUND SAID BODY, SAID HOLLOWED THROAT HAVING A PREDETERMINED AXIAL LENGTH, A METALLIC GATE ELECTRODE IN SAID HOLLOWED THROAT MAKING A RECTIFYING CONTACT WITH SAID TUBULAR BODY AND HAVING AN AXIAL LENGTH WHICH IS LESS THAN THE AXIAL LENGTH OF SAID HOLLOWED THROAT, METALLIC ELECTRODES ON THE ANNULAR END FACES OF SAID TUBULAR BODY WHICH MAKES OHMIC CONTACT THERETO AND A SATURATED OXIDE LAYER ON THE INTERIOR SURFACE OF THE TUBULAR BODY ALONG A SURFACE WHICH IS OPPOSITE SAID THROAT.
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) | 1967-10-20 | 1968-04-20 | 1968-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-20 | 1972-04-20 | 1972-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-20 | 1976-04-20 | 1976-10-20 | $7700.00 | Window Closed / Lapsed |