US2818536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Point contact semiconductor devices and methods of making same
Assignee: Raytheon Co
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Filing: 1952-08-23
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Granted: 1957-12-31
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Expires: 1972-08-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Justice N Carman
- 👤 Elmo E Maiden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:27
CPC Classifications
H; H10; H10D; H10D64/00; H10D64/60; H10D48/00; H10D48/30; H10D48/32; H10D48/34; H10D48/345; H10D62/00; H10D62/10; H10D99/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49224
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
IN A SEMICONDUCTOR DEVICE OF THE POINT CONTACT TYPE, THE COMBINATION COMPRISING: AN N-TYPE GERMANIUM CRYSTAL ELEMENT; A RESILIENT WHISKER ELEMENT IN POINT CONTACT WITH SAID CRYSTAL ELEMENT; SAID WHISKER ELEMENT CONSISTING OF A MOLYBDENUM CORE AND A REGION OF INDIUM IN ELEMENTAL FORM, SAID MOLYBDENUM CORE BEING POINTED AT ONE END THEREOF, SAID INDIUM REGION BEING OF SUBSTANTIAL THICKNESS SURROUNDING AND AFFIXED TO SAID MOLYBDENUM CORE INCLUDING SAID POINTED END; AND A P-TYPE INDIUMDOPED GERMANIUM DEGION WITHIN SAID N-TYPE GERMANIUM CRYSTAL ELEMENT IMMEDIATELY ADJACENT THE CONTACT POINT BETWEEN SAID CRYSTAL ELEMENT AND SAID INDIUM REGION OF SAID WHISKER ELEMENT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |