US2871330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon current controlling devices
Assignee: General Electric Co
•
Filing: 1954-12-22
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Granted: 1959-01-27
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Expires: 1974-12-22
Abstract
No abstract record available.
Inventors
- 👤 Collins Clifford Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:17
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/80; H10N10/85; H10N10/851; H10N10/8556; H10P; H10P95/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
70 words
A SEMICONDUCTOR CURRENT CONTROL MEMBER COMPRISING A MONOCRYSTALLINE BODY CONSISTING ESSENTIALLY OF P-TYPE SILICON HAVING A FINITE EXCESS OF UNCOMPENSATED ACCEPTOR ACTIVATOR INPURITIES FOR SILICON NOT EXCEEDING 1014 ATOMS PER CUBIC CENTIMETER THEREOF IMPREGNATED WITH FROM 1022 TO 2 X 1014 ATOMS OF IRON PER CUBIC CENTIMETER OF SILICON, SAID MEMBER EXHIBITING A CHANGE IN RESISTIVITY FROM APPROXIMATELY 0.01 MEGOHM-CENTIMETERS AT 100* C TO OVER 100 MEGOHM-CENTIMETERS AT -100* C.
References Cited (Backward Citations)
US2402662A
Cited
US2547173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |