Patents by Inventor Ana G. Brunet

Ana G. Brunet 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).

  • Method for removing chlorate from alkali metal hydroxide
    Patent number: 4676971
    Abstract: A method is disclosed for reducing alkali metal chlorate impurities in an aqueous alkali metal hydroxide solution by heating a mixture of the alkali metal hydroxide solution with a hydroxycarboxylic acid or a salt thereof at temperature above about 125.degree. C. and for a period of time sufficient to substantially eliminate the chlorate, the hydroxycarboxylic acid or salt thereof being substantially non-volatile at the heating temperature.
    Type: Grant
    Filed: December 24, 1985
    Date of Patent: June 30, 1987
    Assignee: PPG Industries, Inc.
    Inventors: William H. Cooper, Ana G. Brunet, William F. Campbell