US3381189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mesa multi-channel field-effect triode
Assignee: Raytheon Co
•
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
- 👤 Jr Verda O Hinkle
- 👤 Zuleeg Rainer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:29
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/30; H10D48/32; H10D48/36; H10D10/00; H10D30/00; H10D30/80; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A FIELD-EFFECT TRIODE DEVICE COMPRISING: (A) A BODY OF SEMI-INSULATOR MATERIAL HAVING A MESA PORTION OF A FIRST CONDUCTIVITY TYPE; (B) A GRID CONTROL ELECTRODE MEMBER DISPOSED IN AND SURROUNDED BY SAID MESA PORTION OF SAID BODY; (C) ELECTRICALLY CONDUCTIVE ELECTRODE MEMBERS DISPOSED ON OPPOSITE SURFACES OF SAID MESA PORTION OF SAID BODY; (D) AND A REGION OF SEMI-INSULATOR MATERIAL OF A CONDUCTIVITY TYPE OPPOSITE TO SAID FIRST TYPE DISPOSED ON A SURFACE OF MESA PORTION OF SAID BODY AND EXTENDING THEREINTO SO AS TO ELECTRICALLY CONTACT SAID CONTROL ELECTRODE MEMBER.
Claim 2
Dependent Claim
91 words
A FIELD-EFFECT TRIODE DEVICE COMPRISING: (A) A BODY OF SEMI-INSULATOR MATERIAL HAVING A MESA PORTION OF A FIRST CONDUCTIVITY TYPE; (B) A GRID CONTROL ELECTRODE MEMBER DISPOSED IN AND SURROUNDED BY SAID MESA PORTION OF SAID BODY; (C) ELECTRICALLY CONDUCTIVE ELECTRODE MEMBERS DISPOSED ON OPPOSITE SURFACES OF SAID MESA PORTION OF SAID BODY; (D) AND A REGION OF SEMI-INSULATOR MATERIAL OF A CONDUCTIVITY TYPE OPPOSITE TO SAID FIRST TYPE DISPOSED ON A SURFACE OF MESA PORTION OF SAID BODY AND EXTENDING THEREINTO SO AS TO ELECTRICALLY CONTACT SAID CONTROL ELECTRODE MEMBER.
References Cited (Backward Citations)
US2790037A
Cited
US3109942A
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US3223904A
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FR1324048A
Cited
US3176192A
Cited
US3252003A
Cited
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 |