Patents by Inventor Naoko Katayama

Naoko Katayama 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 solution fork Karl Fischer coulometric titration and method for water content determination using the electrolytic solution
    Patent number: 5962328
    Abstract: An electrolytic solution for Karl Fischer coulometric titration is disclosed which consists mainly of an amine, sulfur dioxide, iodide ions, and a solvent which is a mixed solvent comprising (a) propylene carbonate and (b) a dialkylene glycol monoalkyl ether (wherein the alkylene groups and the alkyl group each have from 1 to 4 carbon atoms). The electrolytic solution, which is based on a less toxic solvent, has fewer side reactions with ketones and is useful in accurately determining the water content of ketones.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: October 5, 1999
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Hiromasa Kato, Naoko Katayama