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:
Feb. 22, 1977
Filed:
Nov. 24, 1975
Applicant:
Inventor:
Robert T Rasmussen, Pottstown, PA (US);
Assignee:
Kawecki Berylco Industries, Inc., Reading, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
75148 ; 75 6 / ; 7513 / ; 7513 / ; 148 32 ;
Abstract
A strontium-silicon-aluminum master alloy for modifying the eutectic component of eutectic and hypo-eutectic aluminum-silicon casting alloys comprises 3 to 20 percent by weight strontium, 5 to 28 percent by weight silicon, each of said elements being present throughout the recited ranges, and the balance essentially aluminum. The master alloy is prepared by adding a strontium compound (e.g., a strontium silicide) to molten aluminum at a temperature of between about 1450.degree. and 2100.degree. F.