Patents by Inventor Shin-ichi Yuki

Shin-ichi Yuki 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 producing fine particles of barium ferrite
    Patent number: 5433878
    Abstract: A method for producing fine particles of barium ferrite, which comprises reacting an aqueous solution comprising an iron compound, a barium compound and an alkaline substance, wherein the molar ratio of hydroxyl groups of the alkaline substance to the total of anions of the iron compound and the barium compound in the aqueous solution is from 1 to 4, and the reaction is carried out at a temperature of at least 250.degree. C. under a pressure of at least 200 kg/cm.sup.2 using a flow type reactor.
    Type: Grant
    Filed: April 19, 1994
    Date of Patent: July 18, 1995
    Assignee: Nissan Chemical Industries Ltd.
    Inventors: Kunio Arai, Tadafumi Ajiri, Shin-ichi Yuki, Isao Ota