Patent US3160800A successfully refreshed from Google Patents.
US3160800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High power semiconductor switch
Assignee: Westinghouse Electric Corp
•
Filing: 1961-10-27
•
Granted: 1964-12-08
•
Expires: 1981-10-27
Abstract
No abstract record available.
Inventors
- 👤 Lee W Smart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:39
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/20; H10D; H10D99/00; H10W20/00; H10W20/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A SEMICONDUCTOR SWITCH COMPRISING: FOUR SUCCESSIVE REGIONS OF ALTERNATE SEMICONDUCTIVITY TYPE INCLUDING A FIRST OUTER REGION ADJACENT A SECOND REGION WITH A RECTIFYING JUNCTION THEREBETWEEN; SAID FIRST OUTER REGION BEING DISPOSED ON A SURFACE OF SAID SECOND REGION AND HAVING AN INDENTATION IN THE PERIPHERY THEREOF LEAVING UNCOVERED A PERIPHERAL PORTION OF SAID SURFACE OF SAID SECOND REGION; A FIRST OHMIC CONTACT ON SAID SURFACE WITHIN SAID INDENTATION AND A SECOND OHMIC CONTACT SUBSTANTIALLY OVER THE ENTIRE SURFACE OF SAID FIRST OUTER REGION.
Claim 2
Dependent Claim
83 words
A SEMICONDUCTOR SWITCH COMPRISING: FOUR SUCCESSIVE REGIONS OF ALTERNATE SEMICONDUCTIVITY TYPE INCLUDING A FIRST OUTER REGION ADJACENT A SECOND REGION WITH A RECTIFYING JUNCTION THEREBETWEEN; SAID FIRST OUTER REGION BEING DISPOSED ON A SURFACE OF SAID SECOND REGION AND HAVING AN INDENTATION IN THE PERIPHERY THEREOF LEAVING UNCOVERED A PERIPHERAL PORTION OF SAID SURFACE OF SAID SECOND REGION; A FIRST OHMIC CONTACT ON SAID SURFACE WITHIN SAID INDENTATION AND A SECOND OHMIC CONTACT SUBSTANTIALLY OVER THE ENTIRE SURFACE OF SAID FIRST OUTER REGION.
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) | 1967-12-08 | 1968-06-08 | 1968-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-08 | 1972-06-08 | 1972-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-08 | 1976-06-08 | 1976-12-08 | $7700.00 | Window Closed / Lapsed |