Patents by Inventor William J. Nielsen

William J. Nielsen 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).

  • Patent number: 5836303
    Abstract: A respirator apparatus comprises a mask with a passage and a mesh material disposed across the passage. The mesh material is fused between two layers of the mask material in a molding process. The mask is made of a cross-linked polyethylene material that is flexible, resilient, impervious to liquids, and a good insulator. The cross-linked polyethylene material may be formed to fit the individual facial contours of the wearer, and has a memory. A lip is disposed across the top of the mask, and provides a seal, preventing moist air from escaping that may fog the goggles or the glasses of the wearer.
    Type: Grant
    Filed: September 17, 1996
    Date of Patent: November 17, 1998
    Assignee: Thermal Air Products, Inc.
    Inventors: Wendell Hurst, William J. Nielsen, Robert C. Metzger, Frederick D. Walker
  • Patent number: D648643
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: November 15, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Philip J. Battenberg, William J. Nielsen, Michael G. Wurm, Patrick J. Kilps, Thomas E. King, Jeffrey M. Smits
  • Patent number: D654386
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: February 21, 2012
    Assignee: 3M Innovative Properties Company
    Inventors: Philip J. Battenberg, William J. Nielsen, Michael G. Wurm, Patrick J. Kilps, Thomas E. King, Jeffrey M. Smits