Patents by Inventor Roy E. Fielder

Roy E. Fielder 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).

  • Respirator cartridge with sealant dispersion member
    Patent number: 5063926
    Abstract: A respirator cartridge having body, cover and filter media elements, and including a sealant dispersion member in one of the body or cover elements. The dispersion member directs the sealant material to the peripheral edge of the filter media without wetting the filtering surface of the media. An improved method for rotational molding filter media in/or for a filter assembly is also provided.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: November 12, 1991
    Assignee: Donaldson Company, Inc.
    Inventors: R. David Forsgren, Henry J. Drasner, III, Roy E. Fielder