Patents Examined by Roy Kind
  • Al-Zn-Mg-Cu-Sc high strength alloy for aerospace and automotive castings
    Patent number: 8157932
    Abstract: An aluminum casting alloy, comprises, in weight percent, about 4-9% Zn; about 1-4% Mg; about 1-2.5% Cu; less than about 0.1% Si; less than about 0.12% Fe; less than about 0.5% Mn; about 0.01-0.05% B; less than about 0.15% Ti; about 0.05-0.2% Zr; about 0.1-0.5% Sc; no more than about 0.05% each miscellaneous element or impurity; no more than about 0.15% total miscellaneous elements or impurities.
    Type: Grant
    Filed: May 23, 2006
    Date of Patent: April 17, 2012
    Assignee: Alcoa Inc.
    Inventors: Xinyan Yan, Jen C. Lin, Cagatay Yanar, Larry Zellman, Xavier Dumant, Robert Tombari, Eric Lafontaine