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. 06, 1988
Filed:
Nov. 24, 1987
Applicant:
Inventors:
Reginald W Smith, Kingston, CA;
Mansor Ghoreshy, Kingston, CA;
Assignee:
Queen's University at Kingston, Kingston, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
420514 ; 164 571 ; 420416 ; 420515 ; 420519 ; 420516 ;
Abstract
An improved castable hypereutectic zinc-aluminum alloy which is free from underside shrinkage is described. Small additions, from about 0.25% and up to about 2 wt% of rare earth metal, preferably in the form of misch metal, to known zinc-aluminum alloys containing from about 20% and up to about 40 wt% aluminum have been found to prevent underside shrinkage in castings with a cross section up to about six inches.