Patents by Inventor Raymond W. Mah

Raymond W. Mah 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).

  • Meta, para-bisphenol based polymer gas separation membranes
    Patent number: 5152811
    Abstract: The invention relates to novel meta, parabisphenol based condensation uncross-linked polymer membranes and a method of separating gases using such membranes.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: October 6, 1992
    Assignee: The Dow Chemical Company
    Inventors: Edgar S. Sanders, Jr., Raymond W. Mah