US3121829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon carbide semiconductor device
Assignee: US Philips Corp
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Filing: 1959-07-31
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Granted: 1964-02-18
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Expires: 1979-07-31
Abstract
No abstract record available.
Inventors
- 👤 Huizing Albert
- 👤 Hubert Jan Van Daal
- 👤 Knippenberg Wilhelm Franciscus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:15
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/80; H10D62/83; H10D62/832; H10D62/8325; C; C23; C23C; C23C24/00; C23C24/08; H10P; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/107; Y10S148/148; Y10S438/00; Y10S438/931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A SEMICONDUCTOR DEVICE COMPRISING A SEMICONDUCTIVE SUBSTANTIALLY MONOCRYSTALLINE BODY OF SILICON CARBIDE, AND AN ELECTRODE-FORMING PREALLOYED MASS FUSED AND MELTED TO SAID BODY AND ADHERENT THERETO, SAID MASS COMPRISING AN ALLOY OF AT LEAST ONE ELEMENT SELECTED FROM A FIRST GROUP CONSISTING OF NICKEL, COBALT, IRON, MANGANESE AND CHROMIUM, AT LEAST ONE ELEMENT SELECTED FROM A SECOND GROUP CONSISTING OF MOLYBEDENUM, TUNGSTEN, TANTALUM, NIOBIUM, TITANIUM, VANADIUM, ZIRCONIUM AND HAFNIUM, THE ELEMENT OF THE SECOND GROUP BEING PRESENT IN AN AMOUNT MORE THAN ZERO BUT NOT MORE THAN 30 AT. PERCENT OF THE ALLOY, AND AN ELEMENT SELECTED FROM A THIRD GROUP CONSISTING OF ACCEPTORS AND DONORS.
Claim 2
Dependent Claim
106 words
A SEMICONDUCTOR DEVICE COMPRISING A SEMICONDUCTIVE SUBSTANTIALLY MONOCRYSTALLINE BODY OF SILICON CARBIDE, AND AN ELECTRODE-FORMING PREALLOYED MASS FUSED AND MELTED TO SAID BODY AND ADHERENT THERETO, SAID MASS COMPRISING AN ALLOY OF AT LEAST ONE ELEMENT SELECTED FROM A FIRST GROUP CONSISTING OF NICKEL, COBALT, IRON, MANGANESE AND CHROMIUM, AT LEAST ONE ELEMENT SELECTED FROM A SECOND GROUP CONSISTING OF MOLYBEDENUM, TUNGSTEN, TANTALUM, NIOBIUM, TITANIUM, VANADIUM, ZIRCONIUM AND HAFNIUM, THE ELEMENT OF THE SECOND GROUP BEING PRESENT IN AN AMOUNT MORE THAN ZERO BUT NOT MORE THAN 30 AT. PERCENT OF THE ALLOY, AND AN ELEMENT SELECTED FROM A THIRD GROUP CONSISTING OF ACCEPTORS AND DONORS.
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) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |