Patents Assigned to Hydanautics
  • Stable membranes from sulfonated polyarylethers
    Patent number: 4990252
    Abstract: The invention provides a novel thin film composite or coated membrane suitable for reverse osmosis, ultrafiltration and microfiltration applications, and having a porous polymeric substrate with one or more microporous layers to which a thin film or coating comprising a sulfonated polyarylether is attached substantively to provide an oxidatively stable, thin hydrophilic film or coating layer, and a method for manufacturing and using the same.
    Type: Grant
    Filed: August 22, 1989
    Date of Patent: February 5, 1991
    Assignee: Hydanautics
    Inventors: John E. Tomaschke, Anthony J. Testa, James G. Vouros