Patent US2849342A successfully refreshed from Google Patents.
US2849342A
Expired / Lapsed
US
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Semiconductor devices and method of making them
Assignee: RCA Corp
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Filing: 1954-06-28
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Granted: 1958-08-26
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Expires: 1974-06-28
Abstract
No abstract record available.
Inventors
- 👤 Jr William M Webster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:47
CPC Classifications
H; H10; H10P; H10P95/00; H10D; H10D99/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
A SEMICONDUCTOR DEVICE COMPRISING A BODY OF CRYSTALLINE SEMICONDUCTOR MATERIAL OF ONE TYPE OF CONDUCTIVITY, EMITTER AND COLLECTOR RECTIFYING ELECTRODES IN CONTACT WITH SAID BODY, THE MAGNITUDE OF CONDUCTIVITY OF SAID BODY VARYING SUBSTANTIALLY EXPONENTIALLY BETWEEN SAID ELECTRODES WITH THE HIGHEST CONDUCTIVITY PORTION ADJACENT TO SAID EMITTER ELECTRODE AND THE LOWEST CONDUCTIVITY PORTION ADJACENT TO SAID COLLECTOR ELECTRODE.
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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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |