Patents by Inventor Eric J. Johnson

Eric J. Johnson 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).

  • Particle-filled microporous materials
    Patent number: 4957943
    Abstract: A microporous particulate-filled thermoplastic polymeric article is provided. The article can be in the form of a film, a fiber, or a tube. The article has a thermoplastic polymeric structure having a plurality of interconnected passageways to provide a network of communicating pores. The microporous structure contains discrete submicron or low micron-sized particulate filler, the particulate filler being substantially non-agglomerated.
    Type: Grant
    Filed: October 14, 1988
    Date of Patent: September 18, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Jerome W. McAllister, Kevin E. Kinzer, James S. Mrozinski, Eric J. Johnson, James F. Dyrud