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. 13, 1988
Filed:
Jan. 16, 1987
Applicant:
Inventor:
Nick G Lirones, Muskegon, MI (US);
Assignee:
Howmet Turbine Components Corporation, Greenwich, CT (US);
Primary Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
75 9 / ; 75 63 ; 75 6 / ;
Abstract
A method of purifying molten metal that reduces the amount of contaminants therein by maintaining the molten metal in a quiescent state allowing buoyant impurities in the metal to float to the top. The top of the molten metal is cooled solidifying the top portion and entrapping the impurities in the solid layer. The molten metal is then cast from beneath the solid portion.