Patents by Inventor Tomoyasu Ono

Tomoyasu Ono 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 1-amino-1,2,3-triazole
    Patent number: 5728841
    Abstract: This invention is to provide a process for preparing 1-amino-1,2,3-triazole represented by formula (III): ##STR1## comprising cyclizing glyoxal bishydrazone represented by formula (I): ##STR2## by reaction with an aqueous hydrogen peroxide solution in the presence of a catalytic amount of a transition metal oxide represented by formula (II):M.sub.m O.sub.nwherein M represents a transition metal atom; and m and n, which may be the same or different, each represent an integer of 1 to 5.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: March 17, 1998
    Assignee: Taiho Pharmaceutical Co., Ltd.
    Inventors: Kazuhiko Shigeno, Tomoyasu Ono, Motoaki Tanaka, Shozo Yamada, Tetsuji Asao