Patents by Inventor Walter J. Hyder

Walter J. Hyder 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).

  • Aluminum chlorohydrate or hydrotalcite treated kaolin clays for pitch control
    Patent number: 5037508
    Abstract: Kaolin clay treated with 0.5 to 1.5 wt. % of aluminum chlorohydrate or a double hydroxide of aluminum and magnesium are an effective pitch adsorption agent for use in paper making processes.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: August 6, 1991
    Assignee: J. M. Huber Corporation
    Inventors: Walter J. Hyder, Albert C. Kunkle, Robert M. Weaver
  • Kaolin clays for pitch control
    Patent number: 4927465
    Abstract: Kaolin clay treated with 0.5 to 1.5 wt. % of aluminum chlorohydrate or a double hydroxide of aluminum and magnesium are an effective pitch adsorption agent for use in paper making processes.
    Type: Grant
    Filed: October 19, 1987
    Date of Patent: May 22, 1990
    Assignee: J. M. Huber Corporation
    Inventors: Walter J. Hyder, Albert C. Kunkle, Robert M. Weaver