Patents Assigned to Poryair Limited
  • Production of porous materials
    Patent number: 4242464
    Abstract: An improved microporous polymer material is made by coagulating, e.g. in water, a polymer solution containing dispersed microscopic particles of a removable filler soluble in a coagulating liquid.
    Type: Grant
    Filed: May 23, 1979
    Date of Patent: December 30, 1980
    Assignee: Poryair Limited
    Inventor: David L. Boutle