Patents by Inventor Kura Yasuo

Kura Yasuo 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).

  • Process for preparing titanium dioxide
    Patent number: 4133864
    Abstract: Titanium dioxide of improved properties for use as a pigment is obtained by a process in which a non-concentrated acid solution containing not more than 200 grams of TiO.sub.2 per liter of solution is partially hydrolyzed and filtered; and additional acid solution slowly added with heating to hydrolyze the remaining TiO.sub.2 and give a product which, on calcining has a color index of about 1500.
    Type: Grant
    Filed: March 23, 1978
    Date of Patent: January 9, 1979
    Assignee: Dong Hwa Titanium Industrial Co.
    Inventors: Kosaki Yoshio, Yagi Katsumi, Kura Yasuo