Patents Assigned to Limit Instant Limited
  • Chemical modification of membrane to modify transport properties
    Patent number: 4599364
    Abstract: The transport properties of a polymeric ultrafiltration membrane are modified by passing aqueous liquid through the membrane at a temperature less than the glass transition temperature, progressively lowering the pH of the liquid to break hydrogen bonds in the polymer, and reacting the activated polymer with a reagent which is a reactive textile finishing product.
    Type: Grant
    Filed: December 17, 1984
    Date of Patent: July 8, 1986
    Assignee: Limit Instant Limited
    Inventor: Michel S. Lefebvre