Patents by Inventor Arnold Riihimaki

Arnold Riihimaki 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 lowering chlorate content of alkali metal hydroxides
    Patent number: 4055476
    Abstract: A method of minimizing chlorate formation when brines are decomposed in diaphragm type electrolytic cells which comprises adding brine containing dissolved nickel values periodically to said cell while continuing operation of the cell. The nickel values can be added whenever the chlorate content of the alkali metal hydroxide increases to again minimize chlorate formation.
    Type: Grant
    Filed: January 21, 1977
    Date of Patent: October 25, 1977
    Assignee: Diamond Shamrock Corporation
    Inventors: Leo L. Benezra, David W. Hill, Arnold Riihimaki, Shan-Pu Tsai