Patents by Inventor Masako Hokazono

Masako Hokazono 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 isocyanates using sintered oxides
    Patent number: 5326903
    Abstract: A method for preparing isocyanates by the thermal decomposition of carbamates in the presence of a sintered oxide as catalyst under gaseous phase condition. The sintered oxide is composed of at least one element selected from the group consisting of boron, aluminum, silicon, tin, lead, antimony, zinc, yttrium, lanthanum, titanium, zirconium, niobium, tungsten, and iron. The sintered oxide may be composed of at least one element selected from the group consisting of phosphorus, alkali metal element, and alkaline earth metal element.
    Type: Grant
    Filed: December 28, 1992
    Date of Patent: July 5, 1994
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Yuuji Shimasaki, Hideyuki Kanbe, Masako Hokazono