Patents by Inventor Richard P. Berven

Richard P. Berven 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).

  • Pleated paper filter cartridge
    Patent number: 4187091
    Abstract: A filter including a resilient frame, a hollow body of pleated paper, and end closures, molded together to make a flexible unitary structure which maintains its shape and has the efficiency characteristics of the paper medium.
    Type: Grant
    Filed: August 7, 1978
    Date of Patent: February 5, 1980
    Assignee: Donaldson Company, Inc.
    Inventors: Reynold F. Durre, Richard P. Berven