Patents Assigned to Hokko Chemical Industry Co., Ltd.
  • Pesticidal phenylthionophosphonic acid esters
    Patent number: 4443439
    Abstract: New phenylthionophosphonic acid O,O-di-esters of the general formula: ##STR1## wherein R.sub.1 denotes a lower alkyl group; R.sub.2 denotes a hydrogen atom, a lower alkyl group or an unsaturated lower alkyl group; and R.sub.3 denotes a lower alkyl group or an unsaturated lower alkyl group are provided, which have high insecticidal, miticidal and nematocidal activities and are useful as pesticidal agents to be applied to insect, acarine and/or nematode pests.
    Type: Grant
    Filed: August 27, 1982
    Date of Patent: April 17, 1984
    Assignee: Hokko Chemical Industry Co., Ltd.
    Inventors: Hiromichi Ishikawa, Kazuhiko Kitaori, Satoru Moriyama, Tadashi Chono, Tsugio Uchiyama
  • Thiophene derivatives
    Patent number: 4421761
    Abstract: Thiophene derivatives of the formula ##STR1## wherein X, Y and Z are as herein defined, said compounds being useful as fungicides, are described.
    Type: Grant
    Filed: January 27, 1981
    Date of Patent: December 20, 1983
    Assignees: Hokko Chemical Industry Co. Ltd., Ube Industries, Ltd.
    Inventors: Shigeki Nagai, Takashi Yorie, Hisao Sugiura, Toru Hibi, Katsumi Sato, Takuo Wada, Masahiko Miyahara
  • Organophosphoric acid ester anhydrides as pesticides
    Patent number: 4421750
    Abstract: New organophosphoric acid ester anhydride derivatives, more particularly new thiopyrophosphoric acid P,P,P'-trialkylester-P'-dialkylamide of the formula ##STR1## wherein R.sub.1 is an alkyl group of 3 to 6 carbon atoms and R.sub.2, R.sub.3 and R.sub.4 may be the same or different from each other and each are an alkyl group of 1 to 6 carbon atoms are now provided. These new organophosphoric acid ester anhydride derivatives have high insecticidal, miticidal and nematocidal activities and are useful as an insecticidal, miticidal and nematocidal agent.
    Type: Grant
    Filed: March 2, 1982
    Date of Patent: December 20, 1983
    Assignee: Hokko Chemical Industry Co., Ltd.
    Inventors: Hiromichi Ishikawa, Kazuhiko Kitaori, Kimiyoshi Kaneko, Satoru Moriyama, Takashi Kobayashi, Tsugio Uchiyama
  • Benzoxazolone derivatives, processes for preparation thereof and compositions containing them
    Patent number: 4420486
    Abstract: Certain new 5,6,7-trichlorobenzoxazolone derivatives are highly active against a wide range of plant fungal and bacterial diseases and have a reduced phytotoxicity. These derivatives are also useful to control the growth of various fungi and bacteria being capable of deteriorating industrial materials.
    Type: Grant
    Filed: January 22, 1981
    Date of Patent: December 13, 1983
    Assignee: Hokko Chemical Industry Co., Ltd.
    Inventors: Hiroshi Ohyama, Kimiyoshi Kaneko, Hiromichi Ishikawa, Sanae Takada, Ken Morita, Takuo Wada, Masahiko Miyahara, Masazumi Arakawa
  • Pyrazolylpyrimidine derivatives
    Patent number: 4405743
    Abstract: The present invention relates to pyrazolylpyrimidine derivatives of the formula ##STR1## wherein X, R.sub.1, R.sub.2 and R.sub.3 are as herein defined. These compounds are useful as fungicides in agriculture and horticulture.
    Type: Grant
    Filed: October 15, 1981
    Date of Patent: September 20, 1983
    Assignees: Hokko Chemical Industry Co., Ltd., Meiji Seika Kaisha Ltd.
    Inventors: Tamio Nishimura, Yoshiko Miyamoto, Hiroshi Ohyama, Hiroshi Yamamura, Ken Morita, Kuniomi Matsumoto, Tetsuro Watanabe
  • Substituted phenyl urea and herbicides for use in paddy field
    Patent number: 4255183
    Abstract: The invention is 3-(4-crotyloxyphenyl)-1,1-dimethyl urea herbicidal compounds.
    Type: Grant
    Filed: June 15, 1978
    Date of Patent: March 10, 1981
    Assignee: Hokko Chemical Industry Co., Ltd.
    Inventors: Hiroshi Ohyama, Sanae Takada, Yoshihisa Watanabe, Jyotaroh Tamura, Iwao Taketomi