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US2844737A
Expired / Lapsed
US
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Semi-conductive materials
Assignee: RCA Corp
•
Filing: 1953-10-30
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Granted: 1958-07-22
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Expires: 1973-10-30
Abstract
No abstract record available.
Inventors
- 👤 Edwin E Hahn
- 👤 Melvin L Schultz
- 👤 George A Morton
- 👤 Albert G Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:08
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/80; H10D62/83; H10D62/834; H10D62/60; H10P; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/074; Y10S420/00; Y10S420/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
CRYSTALLINE SEMI-CONDUCTIVE GERMANIUM HAVING INCORPORATED IN ITS CRYSTAL LATTICE CONDUCTIVITY TYPE-DETERMINING IMPURITIES CONSISTING ESSENTIALLY OF TWO OPPOSITE CONDUCTIVELY TYPES, IMPURITIES OF ONE OF SAID TYPES BEING PROVIDED BY AN ELEMENT MORE THAN ONE COLUMN REMOVED FROM THE FOURTH COLUMN OF THE PERIODIC TABLE ACCORDING TO MENDELEEFF, AND IMPURITIES OF THE OTHER ONE OF SAID TYPES BEING PROVIDED BY AN ELEMENT ADJACENT THE FOURTH COLUMN OF SAID PERIODIC TABLE, THERE BEING AT LEAST AS MANY ATOMS OF SAID OTHER IMPURITY PRESENT AS OF SAID ONE IMPURITY IN SAID CRYSTALLINE GERMANIUM.
Claim 2
Dependent Claim
89 words
CRYSTALLINE SEMI-CONDUCTIVE GERMANIUM HAVING INCORPORATED IN ITS CRYSTAL LATTICE CONDUCTIVITY TYPE-DETERMINING IMPURITIES CONSISTING ESSENTIALLY OF TWO OPPOSITE CONDUCTIVELY TYPES, IMPURITIES OF ONE OF SAID TYPES BEING PROVIDED BY AN ELEMENT MORE THAN ONE COLUMN REMOVED FROM THE FOURTH COLUMN OF THE PERIODIC TABLE ACCORDING TO MENDELEEFF, AND IMPURITIES OF THE OTHER ONE OF SAID TYPES BEING PROVIDED BY AN ELEMENT ADJACENT THE FOURTH COLUMN OF SAID PERIODIC TABLE, THERE BEING AT LEAST AS MANY ATOMS OF SAID OTHER IMPURITY PRESENT AS OF SAID ONE IMPURITY IN SAID CRYSTALLINE GERMANIUM.
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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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |