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:
Apr. 27, 1993
Filed:
May. 06, 1991
Applicant:
Inventor:
Gregory W Knowles, Lexington, VA (US);
Assignee:
Grumman Aerospace Corporation, Bethpage, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B / ;
U.S. Cl.
CPC ...
422248 ; 422245 ; 156D / ;
Abstract
An ampoule contains an ingot of non-monocrystalline material. A seed of the same material but monocrystalline in nature is embedded within the ingot. A spring biases a piston to retain the seed and ingot together, even in an environment with vibrational forces. When the ingot is melted, the piston contains all of the melted material within a volume free of empty space. Upon cooling the ingot solidifies to a monocrystalline mass.