Patent US3824743A successfully refreshed from Google Patents.
Patent US3381187A successfully refreshed from Google Patents.
US3381187A
Expired / Lapsed
US
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High-frequency field-effect triode device
Assignee: Raytheon Co
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Filing: 1964-08-18
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Granted: 1968-04-30
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Expires: 1984-08-18
Abstract
No abstract record available.
Inventors
- 👤 Zuleeg Rainer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:28
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/30; H10D48/32; H10D48/36; H10D10/00; H10D30/00; H10D30/80; H10D99/00; Y; Y10; Y10S; Y10S148/00; Y10S148/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A FIELD-EFFECT TRIODE DEVICE COMPRISING: (A) A BODY OF SEMI-INSULATOR MATERIAL OF A FIRST CONDUCTIVITY-TYPE; (B) A CONTROL ELECTRODE MEMBER IN THE FORM OF A GRID OF SEMI-INSULATOR MATERIAL OF A SECOND TYPE OF CONDUCTIVITY OPPOSITE TO SAID FIRST TYPE DISPOSED WITHIN AND SURROUNDED ON ALL SURFACES BY SAID BODY OF SEMIINSULATOR MATERIAL; (C) ELECTRICALLY CONDUCTIVE ELECTRODE MEMBERS DISPOSED ON OPPOSITE SURFACES OF SAID BODY OF SEMI-INSULATOR MATERIAL AND IN ELECTRICAL CONTACT THEREWITH; (D) A FIRST REGION OF SEMI-INSULATOR MATERIAL OF SAID SECOND TYPE OF CONDUCTIVITY EXTENDING INTO SAID BODY AND SURROUNDING SAID CONTROL ELECTRODE MEMBER WHILE BEING ELECTRICALLY ISOLATED THEREFROM BY PORTIONS OF SAID BODY; (E) AND A SECOND REGION OF SEMI-INSULATOR MATERIAL OF SAID SECOND TYPE OF CONDUCTIVITY EXTENDING INTO SAID BODY FROM A SURFACE THEREOF AND MAKING ELECTRICAL CONTACT TO SAID CONTROL ELECTRODE MEMBER WHILE BEING ELECTRICALLY ISOLATED FROM SAID FIRST REGION BY PORTIONS OF SAID BODY.
Claim 2
Dependent Claim
150 words
A FIELD-EFFECT TRIODE DEVICE COMPRISING: (A) A BODY OF SEMI-INSULATOR MATERIAL OF A FIRST CONDUCTIVITY-TYPE; (B) A CONTROL ELECTRODE MEMBER IN THE FORM OF A GRID OF SEMI-INSULATOR MATERIAL OF A SECOND TYPE OF CONDUCTIVITY OPPOSITE TO SAID FIRST TYPE DISPOSED WITHIN AND SURROUNDED ON ALL SURFACES BY SAID BODY OF SEMIINSULATOR MATERIAL; (C) ELECTRICALLY CONDUCTIVE ELECTRODE MEMBERS DISPOSED ON OPPOSITE SURFACES OF SAID BODY OF SEMI-INSULATOR MATERIAL AND IN ELECTRICAL CONTACT THEREWITH; (D) A FIRST REGION OF SEMI-INSULATOR MATERIAL OF SAID SECOND TYPE OF CONDUCTIVITY EXTENDING INTO SAID BODY AND SURROUNDING SAID CONTROL ELECTRODE MEMBER WHILE BEING ELECTRICALLY ISOLATED THEREFROM BY PORTIONS OF SAID BODY; (E) AND A SECOND REGION OF SEMI-INSULATOR MATERIAL OF SAID SECOND TYPE OF CONDUCTIVITY EXTENDING INTO SAID BODY FROM A SURFACE THEREOF AND MAKING ELECTRICAL CONTACT TO SAID CONTROL ELECTRODE MEMBER WHILE BEING ELECTRICALLY ISOLATED FROM SAID FIRST REGION BY PORTIONS OF SAID BODY.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |