Patents by Inventor Yuichiro Aratake

Yuichiro Aratake 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).

  • Producing Z-isomer of hydrogen bromide salt of 2-aminothiazole derivative
    Patent number: 6403572
    Abstract: There is disclosed a process for producing an acid salt of a (Z)-2-aminothiazole compound of the formula (I): wherein R1 and R2 independently represent an alkyl group having 1 to 5 carbon atoms, Y represents a halogen atom, —OSO3H or —OPO(OH)2, m indicates the valence number of an inorganic acid of the formula: HY wherein Y represents the same as defined above, and n indicates an integer of 1 or 2, which process is characterized by: reacting an acid salt of a 2-aminothiazole compound of the formula (II): wherein R1 and R2 independently represent an alkyl group having 1 to 5 carbon atoms, X represents a bromine atom or an iodine atom, and the wavy line means that this compound is a mixture of the E- and Z-isomers, with the inorganic acid of the formula HY.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: June 11, 2002
    Assignees: Sumitomo Chemical Co., Ltd., Shionogi & co., Ltd.
    Inventors: Isao Kurimoto, Norihiko Hirata, Akihiko Nakamura, Yuichiro Aratake
  • Producing Z-isomer of hydrogen bromide salt of 2-aminothiazole derivative
    Publication number: 20020058818
    Abstract: There is disclosed a process for producing an acid salt of a (Z)-2-aminothiazole compound of the formula (I): 1
    Type: Application
    Filed: November 26, 2001
    Publication date: May 16, 2002
    Applicant: Sumitomo Chemical Co., Ltd.
    Inventors: Isao Kurimoto, Norihiko Hirata, Akihiko Nakamura, Yuichiro Aratake
  • Producing Z-isomer of hydrogen bromide salt of 2-aminothiazole derivative
    Patent number: 6340763
    Abstract: There is disclosed a process for producing an acid salt of a (Z)-2-aminothiazole compound of the formula (I): wherein R1 and R2 independently represent an alkyl group having 1 to 5 carbon atoms, Y represents a halogen atom, —OSO3H or —OPO(OH)2, m indicates the valence number of an inorganic acid of the formula: HY wherein Y represents the same as defined above, and n indicates an integer of 1 or 2, which process is characterized by: reacting an acid salt of a 2-aminothiazole compound of the formula (II): wherein R1 and R2 independently represent an alkyl group having 1 to 5 carbon atoms, X represents a bromine atom or an iodine atom, and the wavy line means that this compound is a mixture of the E- and Z-isomers, with the inorganic acid of the formula HY.
    Type: Grant
    Filed: November 10, 1999
    Date of Patent: January 22, 2002
    Assignees: Sumitomo Chemical Co., Ltd., Shionogi & Co., Ltd.
    Inventors: Isao Kurimoto, Norihiko Hirata, Akihiko Nakamura, Yuichiro Aratake