Patents Assigned to Alcca Inc.
  • Patent number: 6669897
    Abstract: A method of treating a surface of a stacked aluminum alloy ingot during a heating process. Spacer blocks are positioned adjacent aluminum alloy ingots to form a stack, wherein the spacer block has a support surface contacting a contact surface of the aluminum alloy ingot, and at least one of the support surface and the contact surface include a fluorine containing material. The stack is heated to at least a temperature at which the fluorine containing material decomposes or vaporizes such that a layer of a fluorinated oxide compound is formed at the interfaces between the ingots and the spacer blocks.
    Type: Grant
    Filed: April 22, 2002
    Date of Patent: December 30, 2003
    Assignee: Alcca Inc.
    Inventors: Joseph P. Harenski, Roger W. Kaufold, Brian J. Morrissey, Robert L. Shadwick, Jr., Larry F. Wieserman