Patents by Inventor Karl Albert Herbst

Karl Albert Herbst has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • AA6000 aluminum sheet method
    Patent number: 6652678
    Abstract: A method of converting an ingot of a 6000 series aluminium alloy to self-annealing sheet, comprises subjecting the ingot to a two-stage homogenisation treatment, first at at least 560° C. and then at 450° C. to 480° C., then hot rolling the homogenised ingot at a starting hot roll temperature of 450° C. to 480° C. and a finishing hot roll temperature of 320° C. to 360° C. The resulting hot rolled sheet has an unusually low Cube recrystallisation component.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: November 25, 2003
    Assignee: Alcan International Limited
    Inventors: Graeme John Marshall, Karl Albert Herbst, Martin Heinze, Richard Hamerton