Patents by Inventor Michael Thomas Heffelfinger

Michael Thomas Heffelfinger 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).

  • Styrenic block copolymer breathable elastomeric films
    Patent number: 6794024
    Abstract: A breathable, elastic film including a high performance elastomer, such as a styrenic copolymer, and a low performance elastomer, such as a polyolefin, filled with a plurality of particles suitable for forming pores in the film upon stretch-thinning of the film, the film having been stretch-thinned, whereby the low performance elastomer portion of the film forms a plurality of micropores. Also disclosed are laminates employing this breathable, elastic film.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: September 21, 2004
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Glynis Allicia Walton, Richard Macferran Shane, Glen Thomas Mildenhall, Michael Thomas Heffelfinger
  • Multi-layer films with syndiotactic barrier layer containing a wax
    Patent number: 6159612
    Abstract: An oriented multi-layer film comprises:(a) at least one layer comprising an olefin polymer, for example, isotactic polypropylene; and(b) a barrier layer adjacent the at least one layer of (a), comprising a syndiotactic polypropylene which preferably possesses an isotacticity of less than 25%, more preferably less than 15%, in particular less than 6%, and moisture and oxygen permeability reducing amounts of wax.
    Type: Grant
    Filed: August 25, 1997
    Date of Patent: December 12, 2000
    Assignee: Mobil Oil Corporation
    Inventors: Shaw-Chang Chu, Michael Thomas Heffelfinger, Jay K. Keung, Robert G. Peet