Patents by Inventor William M. Stevenson

William M. Stevenson 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 assemblies with adhesive attachment systems
    Patent number: 6419729
    Abstract: Filter assemblies with adhesive attachment systems are provided. In one embodiment, a filter assembly includes a porous filter member and an adhesive disposed on a reinforcement scrim adhesively attached to at least a portion of at least one major surface of the porous filter member, wherein the reinforcement scrim has discrete open areas. In an alternative embodiment, a filter assembly includes a porous filter member that includes fibrous filter media and an adhesive impregnated into discrete regions of the porous filter member such that there is a substantially continuous adhesive region throughout at least about 25% of the thickness of the porous filter member in the discrete regions.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: July 16, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: Dean R. Duffy, William M. Stevenson, John F. Reed, David J. Andrews