Patents by Inventor Roseanne M. Woo

Roseanne M. Woo 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).

  • Electrolytic process and apparatus
    Patent number: 4248680
    Abstract: Disclosed is an electrolytic cell having an anode, a cathode, and a synthetic fluoro-carbon-resin permionic membrane between the anode and cathode. The improvement is characterized by the fluorocarbon-resin permionic membrane being a fluorinated copolymer having carboxylic acid ion exchange groups and the cathode having a catalytic, non-ferrous surface. Also disclosed is a process of producing an alkali metal hydroxide by electrolyzing an aqueous alkali metal chloride brine in an electrolytic cell having the anode separated from a catalytic, non-ferrous cathode by a synthetic fluorocarbon-resin permionic membrane having carboxylic acid ion exchange groups.
    Type: Grant
    Filed: January 24, 1979
    Date of Patent: February 3, 1981
    Assignee: PPG Industries, Inc.
    Inventors: William W. Carlin, William B. Darlington, Donald W. DuBois, Roseanne M. Woo