Patents by Inventor Lindy J. Curtis

Lindy J. Curtis 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).

  • Method for surface activation of water atomized powders by pickling
    Patent number: 4960459
    Abstract: A method for pickling and consolidating water atomized metallic powders to reduce surface oxides. The technique includes introducing the powder into an acid bath--preferably nitric acid and hydrofluoric acid, rinsing the powder, introducing the powder into an alkaline bath, rinsing the powder and then consolidating the powder into a workpiece. Alternatively, the powder can be additionally introduced into a second acid bath and/or placed into a finishing boric acid bath before consolidation.
    Type: Grant
    Filed: September 19, 1988
    Date of Patent: October 2, 1990
    Assignee: Inco Alloys International, Inc.
    Inventors: Jon M. Poole, Lindy J. Curtis
  • Method for surface activation of water atomized powders
    Patent number: 4818482
    Abstract: A method for pickling and consolidating water atomized metallic powders to reduce surface oxides. The technique includes introducing the powder into an acid bath--preferably nitric acid and hydrofluoric acid, rinsing the powder, introducing the powder into an alkaline bath, rinsing the powder and then consolidating the powder into a workpiece. Alternatively, the powder can be additionally introduced into a second acid bath and/or placed into a finishing boric acid bath before consolidation.
    Type: Grant
    Filed: July 9, 1987
    Date of Patent: April 4, 1989
    Assignee: Inco Alloys International, Inc.
    Inventors: Jon M. Poole, Lindy J. Curtis
  • Canless method for hot working gas atomized powders
    Patent number: 4587096
    Abstract: A canless method for hot working a nickel-base gas atomized alloy powder. The powder is blended with nickel powder, consolidated and sintered to a sufficient green strength. The surface of the resultant form is sealed to create an oxygen impervious layer so as to prevent oxidation therein. The sealed surface, in a sense, acts as a can. The form is then reheated and hot worked.
    Type: Grant
    Filed: May 23, 1985
    Date of Patent: May 6, 1986
    Assignee: Inco Alloys International, Inc.
    Inventors: William L. Mankins, Lindy J. Curtis, Gene A. Stewart