Patents by Inventor Toshikazu Ohtsuka

Toshikazu Ohtsuka 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).

  • Publication number: 20040116493
    Abstract: The object of the present invention is to provide a compound having an anti-Helicobacter action.
    Type: Application
    Filed: December 1, 2003
    Publication date: June 17, 2004
    Inventors: Giichi Sugimori, Toshikazu Ohtsuka, Moriyasu Masui
  • Patent number: 6329371
    Abstract: A compound represented by the formula (I): wherein R1 is an optionally substituted heterocyclic group; R2 is optionally substituted aryl or heterocyclic group; R3 is hydrogen, alkyl, alkenyl, or alkynyl; R4 is hydrogen, alkyl, alkoxy, halogen, nitro, cyano, or halogenated alkyl; M is oxygen, S(O)i wherein i is 0, 1, or 2, NR5 wherein R5 is hydrogen, alkyl, or acyl, —Q—N═C(R6)—, —B—C(R8)═N—, —CH═N—N═C(R9)—, or —CH═N—A—(CR10R11)m—; and n is 0, 1, or 2, an intermediate for producing the same and an agrochemical composition containing the same as an active ingredient.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: December 11, 2001
    Assignee: Shionogi & Co., Ltd.
    Inventors: Hiroyuki Kai, Akira Takase, Toshikazu Ohtsuka
  • Patent number: 6313150
    Abstract: An &agr;-substituted phenylacetic acid derivative useful as an agricultural fungicide, represented by general formula (I), or a salt thereof, a process for producing the same, an intermediate for the production thereof, and an agricultural fungicide containing the same as the active ingredient, wherein R1 represents halogen, alkyl, OH, alkylthio, alkylsulfinyl, alkylsulfonyl, amino or nitro; Q represents aryl, heterocycle, mono- or disubstituted methyleneamino, (substituted amino-)methyl, alkyl, alkenyl, alkynyl, substituted carbonyl or substituted sulfonyl; X represents hydrogen, halogen, alkyl or OH; Y represents OH, alkylthio or amino; Z represents oxygen or sulfur; M represents oxygen, S(O)i (i being 0, 1 or 2), NR2 (R2 being hydrogen, alkyl or acyl) or a single bond; and n represents 0, 1 or 2.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: November 6, 2001
    Assignee: Shionogi & Co., Ltd.
    Inventors: Toshikazu Ohtsuka, Takami Murashi, Shinji Suzuki, Michio Masuko, Hideyuki Takenaka
  • Patent number: 6136837
    Abstract: A compound represented by the formula (I): wherein R.sup.1 is an optionally substituted heterocyclic group; R.sup.2 is optionally substituted aryl or heterocyclic group; R.sup.3 is hydrogen, alkyl, alkenyl, or alkynyl; R.sup.4 is hydrogen, alkyl, alkoxy, halogen, nitro, cyano, or halogenated alkyl; M is oxygen, S(O).sub.i wherein i is 0, 1, or 2, NR.sup.5 wherein R.sup.5 is hydrogen, alkyl, or acyl, --Q--N.dbd.C(R.sup.6)--, --B--C(R.sup.8).dbd.N--, --CH.dbd.N--N.dbd.C(R.sup.9)--, or --CH.dbd.N--A--(CR.sup.10 R.sup.11)m--; and n is 0, 1, or 2, an intermediate for producing the same and an agrochemical composition containing the same as an active ingredient.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: October 24, 2000
    Assignee: Shionogi & Co., Ltd.
    Inventors: Hiroyuki Kai, Akira Takase, Toshikazu Ohtsuka
  • Patent number: 5965740
    Abstract: A compound represented by the formula (I): ##STR1## wherein R.sup.1 is an optionally substituted heterocyclic group; R.sup.2 is optionally substituted aryl or heterocyclic group; R.sup.3 is hydrogen, alkyl, alkenyl, or alkynyl; R.sup.4 is hydrogen, alkyl, alkoxy, halogen, nitro, cyano, or halogenated alkyl; M is oxygen, S(O).sub.i wherein i is 0, 1, or 2, NR.sup.5 wherein R.sup.5 is hydrogen, alkyl, or acyl, --Q--N.dbd.C(R.sup.6)--, --B--C(R.sup.8).dbd.N--, --CH.dbd.N--N.dbd.C(R.sup.9)--, or --CH.dbd.N--A--(CR.sup.10 R.sup.11)m--; and n is 0, 1, or 2, an intermediate for producing the same and an agrochemical composition containing the same as an active ingredient.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: October 12, 1999
    Assignee: Shionogi & Co., Ltd.
    Inventors: Hiroyuki Kai, Akira Takase, Toshikazu Ohtsuka
  • Patent number: 5948819
    Abstract: An .alpha.-substituted phenylacetic acid derivative useful as an agricultural fungicide, represented by general formula (I), or a salt thereof, a process for producing the same, an intermediate for the production thereof, and an agricultural fungicide containing the same as the active ingredient, wherein R.sup.1 represents halogen, alkyl, OH, alkylthio, alkylsulfinyl, alkylsulfonyl, amino or nitro; Q represents aryl, heterocycle, mono- or disubstituted methyleneamino, (substituted amino-)methyl, alkyl, alkenyl, alkynyl, substituted carbonyl or substituted sulfonyl; X represents hydrogen, halogen, alkyl or OH; Y represents OH, alkylthio or amino; Z represents oxygen or sulfur; M represents oxygen, S(O)i (i being 0, 1 or 2), NR.sup.2 (R.sup.2 being hydrogen, alkyl or acyl) or a single bond; and n represents 0, 1 or 2.
    Type: Grant
    Filed: October 7, 1996
    Date of Patent: September 7, 1999
    Assignee: Shionogi & Co., Ltd
    Inventors: Toshikazu Ohtsuka, Takami Murashi, Shinji Suzuki, Michio Masuko, Hideyuki Takenaka
  • Patent number: 5519139
    Abstract: There is disclosed a novel 4-aminopyrimidine derivative containing an optionally esterified carboxyl group at the 5-position which has potent fungicidal activity as well as insecticidal and miticidal activity. The compound is useful as agricultural fungicides, insecticides and miticides.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: May 21, 1996
    Assignee: Shionogi & Co., Ltd.
    Inventors: Toshikazu Ohtsuka, Moriyasu Masui, Takami Takeda, Michio Masuko, Katsuaki Ohba
  • Patent number: 5439911
    Abstract: There is disclosed a novel 4-aminopyrimidine derivative containing an optionally esterified carboxyl group at the 5-position which has potent fungicidal activity as well as insecticidal and miticidal activity. The compound is useful as agricultural fungicides, insecticides and miticides. There are also disclosed a process for producing the above compound and agricultural fungicidal, insecticidal and miticidal compositions.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: August 8, 1995
    Assignee: Shionogi & Co., Ltd.
    Inventors: Toshikazu Ohtsuka, Moriyasu Masui, Takami Takeda, Michio Masuko, Katsuaki Ohba
  • Patent number: 4695312
    Abstract: A compound (I) of the formula: ##STR1## (wherein X and Y each is halogen) and herbicidal compositions containing the compound (I) are provided.
    Type: Grant
    Filed: March 31, 1986
    Date of Patent: September 22, 1987
    Assignee: Shionogi & Co., Ltd.
    Inventors: Yoshio Hayase, Toshikazu Ohtsuka, Kinya Ide, Toshio Takahashi
  • Patent number: 4663314
    Abstract: A compound of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are each phenyl optionally substituted by one selected from the group consisting of C.sub.1 -C.sub.5 alkyl, C.sub.1 -C.sub.5 alkoxy, C.sub.1 -C.sub.5 alkylthio, C.sub.1 -C.sub.5 alkylenedioxy, halogen, nitro, and halogeno-C.sub.1 -C.sub.5 alkoxy; R.sup.3 and R.sup.4 are each C.sub.1 -C.sub.5 alkyl; and Z is N or CH. A method for preparing the compound (I) and a pesticidal formulation containing the same are also provided.
    Type: Grant
    Filed: May 6, 1986
    Date of Patent: May 5, 1987
    Assignee: Shionogi & Co., Ltd.
    Inventors: Yoshio Hayase, Toshikazu Ohtsuka, Takeo Ishiguro, Toshio Takahashi