Patent US4410607A successfully refreshed from Google Patents.
US3434019A
Expired / Lapsed
US
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High frequency high power transistor having overlay electrode
Assignee: RCA Corp
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Filing: 1963-10-24
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Granted: 1969-03-18
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Expires: 1983-10-24
Abstract
No abstract record available.
Inventors
- 👤 Donald R Carley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:00
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/10; H10D62/13; H10D62/133; H10D62/135; H10D10/00; H10D10/01; H10D10/051; H10D10/056; H10D10/058; H10D99/00; H10P; H10P95/00; H10W; H10W20/00; H10W20/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A TRANSISTOR COMPRISING A CRYSTALLINE SEMICONDUCTIVE BODY, AN ELECTRICALLY INSULATING COATING ON ONE SURFACE OF SAID BODY: A PLURALITY OF DISCRETE GIVEN CONDUCTIVITY TYPE EMITTER REGIONS IN SAID BODY AT SAID SURFACE THEREOF; A COLLECTOR REGION OF SAID GIVEN CONDUCTIVITY TYPE IN SAID BODY; AN OPPOSITE CONDUCTIVITY TYPE BASE REGION IN SAID BODY BETWEEN SAID EMITTER AND COLLECTOR REGIONS; A PLURALITY OF CONDUCTIVE ZONES IN SAID BASE REGION ADJACENT SAID SURFACE, SAID ZONES BEING OF SAID OPPOSITE CONDUCTIVITY TYPE BUT OF SUBSTANTIALLY LOWER RESISTIVITY THAN THE REMAINDER OF SAID BASE REGION, SAID ZONES BEING DISPOSED BETWEEN AND SPACED FROM SAID EMITTER REGIONS;
Claim 2
Dependent Claim
102 words
A TRANSISTOR COMPRISING A CRYSTALLINE SEMICONDUCTIVE BODY, AN ELECTRICALLY INSULATING COATING ON ONE SURFACE OF SAID BODY: A PLURALITY OF DISCRETE GIVEN CONDUCTIVITY TYPE EMITTER REGIONS IN SAID BODY AT SAID SURFACE THEREOF; A COLLECTOR REGION OF SAID GIVEN CONDUCTIVITY TYPE IN SAID BODY; AN OPPOSITE CONDUCTIVITY TYPE BASE REGION IN SAID BODY BETWEEN SAID EMITTER AND COLLECTOR REGIONS; A PLURALITY OF CONDUCTIVE ZONES IN SAID BASE REGION ADJACENT SAID SURFACE, SAID ZONES BEING OF SAID OPPOSITE CONDUCTIVITY TYPE BUT OF SUBSTANTIALLY LOWER RESISTIVITY THAN THE REMAINDER OF SAID BASE REGION, SAID ZONES BEING DISPOSED BETWEEN AND SPACED FROM SAID EMITTER REGIONS;
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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) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |