Patents by Inventor James D. Benson

James D. Benson 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).

  • Filter structure with two or more layers of fine fiber having extended useful service life
    Patent number: 6746517
    Abstract: The use of fine fiber or fiber having a fiber diameter of about 0.0001 to 0.5 microns has become an important design tool for filter media. Common filter media have been prepared with a layer of fine fiber on typically formed the upstream or intake side of the media structure. The fine fiber increases the efficiency of filtration by trapping small particles which increases the overall particulate filtration efficiency of the structure. Improved fine fiber structures have been developed in which a controlled amount of fine fiber is placed on both sides of the media to result in an improvement in filter efficiency but a substantial improvement in lifetime.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: June 8, 2004
    Assignee: Donaldson Company, Inc.
    Inventors: James D. Benson, Douglas G. Crofoot, Mark A. Gogins, Thomas M. Weik
  • Filter structure with two or more layers of fine fiber having extended useful service life
    Publication number: 20020046656
    Abstract: The use of fine fiber or fiber having a fiber diameter of about 0.0001 to 0.5 microns has become an important design tool for filter media. Common filter media have been prepared with a layer of fine fiber on typically formed the upstream or intake side of the media structure. The fine fiber increases the efficiency of filtration by trapping small particles which increases the overall particulate filtration efficiency of the structure. Improved fine fiber structures have been developed in which a controlled amount of fine fiber is placed on both sides of the media to result in an improvement in filter efficiency but a substantial improvement in lifetime.
    Type: Application
    Filed: May 31, 2001
    Publication date: April 25, 2002
    Inventors: James D. Benson, Douglas G. Crofoot, Mark A. Gogins, Thomas M. Weik