Patents by Inventor William K. W. Chen

William K. W. Chen 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).

  • Drum coagulator for preparing microporous membranes
    Patent number: 4598662
    Abstract: A process and device for producing a flexible layered article suitable for use in water proof garments wherein one of said layers is a microporous membrane material produced from the "solvent non-solvent" method wherein a fabric backing coated with the membrane material dissolved in a solvent is contacted with a drum having gripping means offering substantial resistance to the natural tendency of the coated fabric to curl when immersed in a non-solvent for the polymer material.
    Type: Grant
    Filed: February 11, 1983
    Date of Patent: July 8, 1986
    Assignee: International Microporous Technology, Inc.
    Inventor: William K. W. Chen