US2504627A
Expired / Lapsed
US
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Electrical device with germanium alloys
Assignee: Purdue Research Foundation
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Filing: 1946-03-01
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Granted: 1950-04-18
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Expires: 1966-03-01
Abstract
No abstract record available.
Inventors
- 👤 Benzer Seymour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:48
CPC Classifications
H; H10; H10F; H10F30/00; H10F30/20; H10F30/21; H10F30/22; H10F30/2205; H10F99/00; G; G01; G01L; G01L1/00; G01L1/18; H03; H03K; H03K3/00; H03K3/02; H10D; H10D48/00; H10D48/50; H10D62/00; H10D62/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
AN ELECTRICAL DEVICE COMPRISING A SEMICONDUCTOR CONSISTING OF A BODY OF AN ALLOY OF GERMANIUM AND NITROGEN AND HAVING P-TYPE AND N-TYPE REGIONS OF THE CHARACTER DESCRIBED, AND A CONDUCTOR OF GOOD ELECTRICAL CONDUCTIVITY IN CONFACT WITH A POINT ON THE SURFACE OF SAID SEMICONDUCTOR IN THE TRANSITION REGION BETWEEN SAID P-TYPE AND SAID N-TYPE REGIONS SELECTED TO PROVIDE THE PROPERTY THAT THE RESISTANCE TO CURRENT FLOW IN THE LOW RESISTANCE DIRECTION OF CURRENT FLOW THROUGH THE DEVICE IS VARIABLE UPON THE APPLICATION OF PREDETERMINED LIGHT ON THE SELECTED POINT OF CONTACT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |