Patents by Inventor Norboru Yoshida

Norboru Yoshida 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).

  • N-Substituted imidazolecarboxamide derivatives
    Patent number: 4140788
    Abstract: N-Substituted imidazolecarboxamide compounds represented by the formula; ##STR1## wherein R.sub.1 is hydrogen atom, lower alkyl, lower alkenyl, aralkyl, R.sub.2 is hydrogen atom, lower alkyl, lower alkenyl, aralkyl, 1-adamantyl, R.sub.3 is hydrogen atom, lower alkyl, aralkyl; with the proviso that one of R.sub.1, R.sub.2 or R.sub.3 is not hydrogen when the other two are hydrogen, are produced by reacting aminomalonamide derivative with orthoformate derivative in high yields. The compounds (I) exhibit anti-tumor activity against experimental tumors such as Sarcoma 180 in mice.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: February 20, 1979
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Toshio Atsumi, Yuzo Tarumi, Norboru Yoshida