US3047439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon carbide semiconductor device
Assignee: US Philips Corp
•
Filing: 1959-07-31
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Granted: 1962-07-31
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Expires: 1979-07-31
Abstract
No abstract record available.
Inventors
- 👤 Hubert Jan Van Daal
- 👤 Knippenberg Wilhelm Franciscus
- 👤 Huizing Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:35
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/80; H10D62/83; H10D62/832; H10D62/8325; Y; Y10; Y10S; Y10S148/00; Y10S148/107; Y10S148/148; Y10S438/00; Y10S438/931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A SEMICONDUCTOR DEVICE COMPRISING A SEMICONDUCTIVE BODY OF SILICON CARBIDE CONTAINING A SURFACE REGION OF N-TYPE CONDUCTIVITY AND A FUSED MASS ALLOYED AND ADHERENT TO TEH SAID SYRFACE REGION AND CONSTITUTING AN OHMIC CONNECTION THERETO, SAID MASS COMPRISING ESSEN-
Claim 2
Dependent Claim
39 words
A SEMICONDUCTOR DEVICE COMPRISING A SEMICONDUCTIVE BODY OF SILICON CARBIDE CONTAINING A SURFACE REGION OF N-TYPE CONDUCTIVITY AND A FUSED MASS ALLOYED AND ADHERENT TO TEH SAID SYRFACE REGION AND CONSTITUTING AN OHMIC CONNECTION THERETO, SAID MASS COMPRISING ESSEN-
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) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |