Patents by Inventor Douglas M. Walser

Douglas M. Walser 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 of making glass fibers having a reduced tendency to give gumming deposits
    Patent number: 4233046
    Abstract: A method and composition are provided for producing an improved sized glass fiber strand that has a reduced tendency to form gummy deposits on fabrication machinery under high relative humidity conditions. The glass fiber strand is treated with a starch based forming size comprising about 50 to about 65 weight percent of the non-aqueous components of the composition being a starch containing cross-links that has been partially cooked along with a hydrogenated vegetable oil, or fatty triglyceride, cationic wetting agent, emulsifying agent, and water. The forming size composition can also contain a salt of a polyamino functional polyamide resin and a carboxylic acid and a wax and a coupling agent.
    Type: Grant
    Filed: June 22, 1979
    Date of Patent: November 11, 1980
    Assignee: PPG Industries, Inc.
    Inventor: Douglas M. Walser
  • Size for forming glass fibers having a reduced tendency to give gumming deposits
    Patent number: 4221602
    Abstract: A method and composition are provided for producing an improved sized glass fiber strand that has a reduced tendency to form gummy deposits on fabrication machinery under high relative humidity conditions. The glass fiber strand is treated with a starch based forming size comprising about 50 to about 65 weight percent of the non-aqueous components of the composition being a starch containing cross-links that has been partially cooked along with a hydrogenated vegetable oil, or fatty triglyceride, cationic wetting agent, emulsifying agent, and water. The forming size composition can also contain a salt of a polyamino functional polyamide resin and a carboxylic acid and a wax and a coupling agent.
    Type: Grant
    Filed: May 16, 1979
    Date of Patent: September 9, 1980
    Assignee: PPG Industries, Inc.
    Inventor: Douglas M. Walser
  • Glass fibers having a reduced tendency to give gumming deposits, forming size
    Patent number: 4197349
    Abstract: A method and composition are provided for producing an improved sized glass fiber strand that has a reduced tendency to form gummy deposits on fabrication machinery under high relative humidity conditions. The glass fiber strand is treated with a starch based forming size comprising about 50 to about 65 weight percent of the non-aqueous components of the composition being a starch containing cross-links that has been partially cooked along with a hydrogenated vegetable oil, or fatty triglyceride, cationic wetting agent, emulsifying agent, and water. The forming size composition can also contain a salt of a polyamino functional polyamide resin and a carboxylic acid and a wax and a coupling agent.
    Type: Grant
    Filed: September 29, 1978
    Date of Patent: April 8, 1980
    Assignee: PPG Industries, Inc.
    Inventor: Douglas M. Walser