US2505633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloys of germanium and method of making same
Assignee: Purdue Research Foundation
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Filing: 1946-03-18
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Granted: 1950-04-25
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Expires: 1966-03-18
Abstract
No abstract record available.
Inventors
- 👤 Randall M Whaley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:43
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; C; C30; C30B; C30B31/00; C30B31/04; G; G01; G01L; G01L1/00; G01L1/18; H03K17/00; H03K17/51; H03K17/74; H10; H10D; H10D48/00; H10D48/50; H10D62/00; H10D62/60; H10D62/80; H10D62/83; H10D62/834; H10D99/00; H10P; H10P10/00; H10P32/00; H10P95/00; Y; Y10; Y10S; Y10S420/00; Y10S420/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
THE METHOD OF MAKING A SEMI-CONDUCTOR HAVING TRANSITION REGIONS BETWEEN N-TYPE AND P-TYPE REGIONS OF THE CHARACTER DESCRIBED COMPRISING ALLOYING NITROGEN WITH GERMANIUM HAVING A PURITY OF AT LEAST 99% AT PRESSURES RANGING FROM 2 MM. TO 760 MM. HG AT A TEMPERATURE OF 1000*C. TO 1100*C. FOR 5 TO ABOUT 15 MINUTES TO FORM AN ALLOY HAVING AN ABUNDANCE OF SAID N-TYPE REGIONS, AND THEN HEATING THE ALLOY THUS FORMED IN VACUUM AT A TEMPERATURE OF 650*C. TO 750*C. FOR ABOUT ONE-HALF HOUR TO ONE HOUR TO PRODUCE A PLURALITY OF SAID P-TYPE REGIONS IN SAID ALLOW.
Claim 2
Independent Claim
98 words
THE METHOD OF MAKING A SEMI-CONDUCTOR HAVING TRANSITION REGIONS BETWEEN N-TYPE AND P-TYPE REGIONS OF THE CHARACTER DESCRIBED COMPRISING ALLOYING NITROGEN WITH GERMANIUM HAVING A PURITY OF AT LEAST 99% AT PRESSURES RANGING FROM 2 MM. TO 760 MM. HG AT A TEMPERATURE OF 1000*C. TO 1100*C. FOR 5 TO ABOUT 15 MINUTES TO FORM AN ALLOY HAVING AN ABUNDANCE OF SAID N-TYPE REGIONS, AND THEN HEATING THE ALLOY THUS FORMED IN VACUUM AT A TEMPERATURE OF 650*C. TO 750*C. FOR ABOUT ONE-HALF HOUR TO ONE HOUR TO PRODUCE A PLURALITY OF SAID P-TYPE REGIONS IN SAID ALLOW.
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) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |