Patents by Inventor Kazuhiko Ohkuma

Kazuhiko Ohkuma 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).

  • Phenylpyrol derivatives
    Patent number: 4326881
    Abstract: Compounds of the general formula ##STR1## wherein Xn is 2-Cl, 3-Cl, 2,3-Cl.sub.2 or 3-CF.sub.3, andR is hydrogen or acetyl,with the proviso that Xn is 2,3-Cl.sub.2 in the case of R being hydrogen, are outstanding effective fungicides.
    Type: Grant
    Filed: December 18, 1978
    Date of Patent: April 27, 1982
    Assignee: Nippon Soda Company Limited
    Inventors: Akiyoshi Ueda, Hideo Takagi, Kazuhiko Ohkuma
  • Cyanopyrrole derivatives
    Patent number: 4229465
    Abstract: Compounds of the general formula ##STR1## wherein X is halogen, lower alkyl or lower haloalkyl, andn is 0, 1 or 2;are outstanding effective fungicides.
    Type: Grant
    Filed: July 6, 1979
    Date of Patent: October 21, 1980
    Assignee: Nippon Soda Company, Ltd.
    Inventors: Kazuhiko Ohkuma, Hideo Takagi, Akira Nakata, Shogo Kosaka
  • Spirolactone derivatives
    Patent number: 4004022
    Abstract: A compound of the formula ##STR1## wherein R.sub.1 is lower alkyl;R.sub.2 and R.sub.3 are methyl, and R.sub.2 forms cyclo-alkylene of 5 to 6 carbon atoms by combining with R.sub.3 ;M is a substituent selected from the group consisting of --CH.sub.2 X and --CHX.sub.2 in which X is halogen;Is useful as fungicide.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: January 18, 1977
    Assignee: Nippon Soda Company Limited
    Inventors: Izumi Kumita, Akiyoshi Ueda, Kazuhiko Ohkuma, Sho Hashimoto, Akira Nakada, Masami Mizuno