Patent US1791927A successfully refreshed from Google Patents.
US2902350A
Expired / Lapsed
US
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Method for single crystal growth
Assignee: RCA Corp
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Filing: 1954-12-21
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Granted: 1959-09-01
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Expires: 1974-12-21
Abstract
No abstract record available.
Inventors
- 👤 Dietrich A Jenny
- 👤 Robert V Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:20
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/28; C30B13/30; Y; Y10; Y10S; Y10S148/00; Y10S148/074
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
IN A METHOD OF GROWING A SINGLE CRYSTAL BY HORIZONTALLY ZONE-MELTING A HORIZONTALLY DISPOSED ELONGATED BODY OF MATERIAL, THE STEPS OF: MELTING AN END PORTION OF SAID ELONGATED BODY BY APPLYING MORE HEAT TO THE BOTTOM THAN TO THE TOP THEREOF TO ESTABLISH A VERTICAL TEMPERATURE GRADIENT THEREIN WHEREBY THE UPPERMOST PARTS OF SAID PORTION OF SIAD ELONGATED BODY BECOME MOLTEN LAST AND SOLIDIFY FIRST UPON TEMPERATURE DECREASE, THE INTERFACE BETWEEN THE MOLTEN AND SOLIDIFIED PORTIONS BEING THEREBY INCLINED, REDUCING THE TEMPERATURE OF A PREDETERMINED AREA OF AN UPPER PORTION OF SAID MOLTEN PORTION TO ABOUT THE FREEZING POINT THEREOF TO ESTABLISH AN AREA OF NUCLEATION, AND MELTING AND FREEZING-OUT SUCCESSIVE PORTIONS OF SID ELONGATED BODY COMMENCING WITH HTOSE PORTIONS ADJACENT TO SAID PREDETERMINED AREA WHEREBY A SINGLE CRYSTAL OF SAID MATERIAL IS GROWN FROM SAID AREA OF NUCLEATION.
Claim 2
Dependent Claim
139 words
IN A METHOD OF GROWING A SINGLE CRYSTAL BY HORIZONTALLY ZONE-MELTING A HORIZONTALLY DISPOSED ELONGATED BODY OF MATERIAL, THE STEPS OF: MELTING AN END PORTION OF SAID ELONGATED BODY BY APPLYING MORE HEAT TO THE BOTTOM THAN TO THE TOP THEREOF TO ESTABLISH A VERTICAL TEMPERATURE GRADIENT THEREIN WHEREBY THE UPPERMOST PARTS OF SAID PORTION OF SIAD ELONGATED BODY BECOME MOLTEN LAST AND SOLIDIFY FIRST UPON TEMPERATURE DECREASE, THE INTERFACE BETWEEN THE MOLTEN AND SOLIDIFIED PORTIONS BEING THEREBY INCLINED, REDUCING THE TEMPERATURE OF A PREDETERMINED AREA OF AN UPPER PORTION OF SAID MOLTEN PORTION TO ABOUT THE FREEZING POINT THEREOF TO ESTABLISH AN AREA OF NUCLEATION, AND MELTING AND FREEZING-OUT SUCCESSIVE PORTIONS OF SID ELONGATED BODY COMMENCING WITH HTOSE PORTIONS ADJACENT TO SAID PREDETERMINED AREA WHEREBY A SINGLE CRYSTAL OF SAID MATERIAL IS GROWN FROM SAID AREA OF NUCLEATION.
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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |