Patents by Inventor J. Keith Harris

J. Keith Harris 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).

  • Process of preparing a composite membrane
    Patent number: 5580650
    Abstract: A process is disclosed for the formation of a high flux composite membrane having a thin discriminating film affixed to a porous support layer through a glue layer. The process comprises the formation of the discriminating film by irradiating an aqueous polymer solution in the substantial absence of drying and under conditions which are sufficient to form a polymer film on the surface of the polymer solution at the interphase of the solution and a blanketing fluid. The film is then affixed to the support through the glue layer which may be the same polymer solution from which the discriminating film is formed.
    Type: Grant
    Filed: June 19, 1995
    Date of Patent: December 3, 1996
    Assignee: The Dow Chemical Company
    Inventors: David J. Forgach, J. Keith Harris, Paul G. Glugla, Donald L. Schmidt, Richard F. Fibiger