The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 25, 1990
Filed:
Mar. 16, 1988
Applicant:
Inventor:
Mark E Koch, Farmer's Branch, TX (US);
Assignee:
LTV Aerospace & Defense Company, Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B / ;
U.S. Cl.
CPC ...
422245 ; 1566161 ; 1566164 ; 165 47 ;
Abstract
This invention provides a method and apparatus for controlled crystal growth. The apparatus involves two tandemly aligned heat pipes separated by a conductive sleeve. The heat pipes establish two different isothermal temperature zones while the sleeve defines a gradient zone. A crystallization zone is located in this gradient zone. The method for controlled growth of a crystal involves lowering an ampoule through the gradient zone at an effective rate.