US2860219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon current controlling devices
Assignee: General Electric Co
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Filing: 1954-09-07
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Granted: 1958-11-11
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Expires: 1974-09-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Ernest A Taft
- 👤 Fordyce H Horn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:22
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/246; G05; G05D; G05D9/00; G05D9/12; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/062; Y10S438/00; Y10S438/914; Y10S438/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
AN ELECTRIC CURRENT CONTROL DEVICE COMPRISING A HIGH PURITY P-TYPE SILICON MONOCRYSTALLINE BODY HAVING A RESISTVITY ABOVE 1 OHM CENTIMETERS AT 25* C., AND SAID BODY HAVING AT LEAST A PORTION THEREOF IMPREGNATED WITH 1013 TO 1017 ATOMS OF GOLD AND A FINITE AMOUNT LESS THAN 1016 ATOMS OF ACCEPTOR IMPURITIES PER CUBIC CENTIMETER THEREDONOR IMPURITIES OTHER THAN GOLD, AND A PAIR OF ELECTRICAL CONNECTIONS TO SPACED REGIONS OF SAID BODY.
Claim 2
Dependent Claim
71 words
AN ELECTRIC CURRENT CONTROL DEVICE COMPRISING A HIGH PURITY P-TYPE SILICON MONOCRYSTALLINE BODY HAVING A RESISTVITY ABOVE 1 OHM CENTIMETERS AT 25* C., AND SAID BODY HAVING AT LEAST A PORTION THEREOF IMPREGNATED WITH 1013 TO 1017 ATOMS OF GOLD AND A FINITE AMOUNT LESS THAN 1016 ATOMS OF ACCEPTOR IMPURITIES PER CUBIC CENTIMETER THEREDONOR IMPURITIES OTHER THAN GOLD, AND A PAIR OF ELECTRICAL CONNECTIONS TO SPACED REGIONS OF SAID BODY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |