Patents by Inventor Lance William Bierwirth

Lance William Bierwirth 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).

  • Lightweight acoustical flooring underlayment
    Patent number: 8347575
    Abstract: An acoustical flooring underlayment for placement between a subfloor and a finished floor, includes a mat having an upper surface, an opposite lower surface and including a plurality of corrugations creating a plurality of depressions in the upper surface. A layer of foam is applied to the upper surface and constructed and arranged to fill the depressions for creating a generally planar top surface configured for accommodating the finished floor.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: January 8, 2013
    Assignee: United States Gypsum Company
    Inventor: Lance William Bierwirth
  • LIGHTWEIGHT ACOUSTICAL FLOORING UNDERLAYMENT
    Publication number: 20120055108
    Abstract: An acoustical flooring underlayment for placement between a subfloor and a finished floor, includes a mat having an upper surface, an opposite lower surface and including a plurality of corrugations creating a plurality of depressions in the upper surface. A layer of foam is applied to the upper surface and constructed and arranged to fill the depressions for creating a generally planar top surface configured for accommodating the finished floor.
    Type: Application
    Filed: September 2, 2010
    Publication date: March 8, 2012
    Inventor: Lance William Bierwirth