Patents Assigned to International Microporous Technology, Inc.
  • 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
  • Method and apparatus for distillation
    Patent number: 4473473
    Abstract: A composite membrane structure is used in a distillation apparatus and method. The composite membrane separates a distilland and a distillate, such as salt water and fresh water. The composite membrane comprises a thin lyophobic microporous layer of membrane and a thin lyophilic layer of membrane. Evaporation and condensation takes place within the micropores of the lyophobic membrane. The lyophilic layer prevents intrusion of distilland into the pores of the lyophobic layer.
    Type: Grant
    Filed: February 2, 1981
    Date of Patent: September 25, 1984
    Assignee: International Microporous Technology, Inc.
    Inventor: Dah Yu Cheng