Patents by Inventor Randall R. Rogers

Randall R. Rogers 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 membranes from polypropylene
    Patent number: 4874567
    Abstract: Microporous polypropylene membrane or hollow fibers is formed from a melt blend of 5 to 20 weight percent polypropylene and a solvent. The melt blend is shaped and cooled to effect solid phase separation of the polypropylene from the blend. The solvent is separated from the polypropylene by extraction and the porous polypropylene is dried under restraint to prevent shrinkage.
    Type: Grant
    Filed: April 24, 1987
    Date of Patent: October 17, 1989
    Assignee: Millipore Corporation
    Inventors: George Lopatin, Larry Y. Yen, Randall R. Rogers