Patents by Inventor Randall P. Swenson

Randall P. Swenson 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).

  • Microporous material from ethylene-chlorotrifluoroethylene copolymer and method for making same
    Patent number: 10240013
    Abstract: Microporous material having a spherulitic matrix made from ethylene chlorotrifluoroethylene copolymer has a plurality of pores having an average pore size greater than about 0.01 micrometer. The material is made by thermally induced phase separation (TIPS) process that includes melt mixing ethylene chlorotrifluoroethylene copolymer, diluent and nucleating agent to provide a melt mixed composition; shaping the melt mixed composition; cooling the shaped melt mixed composition to induce phase separation of the ethylene chlorotrifluoroethylene copolymer to provide a phase separated material; and stretching the phase separated material to provide the microporous material. The microporous material may be incorporated into articles and the articles may include one, two or more layers of microporous material.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: March 26, 2019
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: James S. Mrozinski, Randall P. Swenson, Karl-Dieter Weilandt, Jonathan F. Hester
  • MICROPOROUS MATERIAL FROM ETHYLENE-CHLOROTRIFLUOROETHYLENE COPOLYMER AND METHOD FOR MAKING SAME
    Publication number: 20110244013
    Abstract: Microporous material having a spherulitic matrix made from ethylene chlorotrifluoroethylene copolymer has a plurality of pores having an average pore size greater than about 0.01 micrometer. The material is made by thermally induced phase separation (TIPS) process that includes melt mixing ethylene chlorotrifluoroethylene copolymer, diluent and nucleating agent to provide a melt mixed composition; shaping the melt mixed composition; cooling the shaped melt mixed composition to induce phase separation of the ethylene chlorotrifluoroethylene copolymer to provide a phase separated material; and stretching the phase separated material to provide the microporous material. The microporous material may be incorporated into articles and the articles may include one, two or more layers of microporous material.
    Type: Application
    Filed: December 14, 2009
    Publication date: October 6, 2011
    Inventors: James S. Mrozinski, Randall P. Swenson, Karl-Dieter Weilandt, Jonathan F. Hester