Patents by Inventor Akio Katsuura

Akio Katsuura 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).

  • Process of preparing 5-(2-substituted-4-nitrophenyl)-oxazole, novel oxazole compound, and process of preparing the same
    Patent number: 6423849
    Abstract: A 5-(2-substituted-4-nitrophenyl)-oxazole is prepared by decarboxylating a 5-(2-substituted-4-nitrophenyl)-4-oxazolecarboxylic acid in an aprotic amide solvent containing a protic compound. A 5-(2-substituted-4-nitrophenyl)-oxazolecarboxylic acid and a 5-(2-substituted-4-nitrophenyl)-carboalkoxyoxazole, which are novel compounds, are provided.
    Type: Grant
    Filed: December 26, 2000
    Date of Patent: July 23, 2002
    Assignee: The Nippon Synthetic Chemical Industry Co., Ltd.
    Inventors: Akio Katsuura, Azusa Yonezawa, Keisuke Tsuzuki, Kazumasa Hirata
  • Process of preparing 5-(2-substituted-4-nitrophenyl)-oxazole, novel oxazole compound, and process of preparing the same
    Publication number: 20020035265
    Abstract: A 5-(2-substituted-4-nitrophenyl)-oxazole is prepared by decarboxylating a 5-(2-substituted-4-nitrophenyl)-4-oxazolecarboxylic acid in an aprotic amide solvent containing a protic compound. A 5-(2-substituted-4-nitrophenyl)-oxazolecarboxylic acid and a 5-(2-substituted-4-nitrophenyl)-carboalkoxyoxazole, which are novel compounds, are provided.
    Type: Application
    Filed: December 26, 2000
    Publication date: March 21, 2002
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Akio Katsuura, Azusa Yonezawa, Keisuke Tsuzuki, Kazumasa Hirata
  • Method of producing formylimidazoles
    Patent number: 5336779
    Abstract: In producing formylimidazoles by catalytically oxidizing the corresponding 4- or 5-hydroxymethylimidazoles, the catalytic oxidation is carried out in the presence of a noble metal catalyst while oxygen or air is blown into the reaction system. In this case, it is particularly desirable that the catalytic oxidation in the presence of a noble metal catalyst be carried out in a solvent comprising an aqueous alkali or in a mixed solvent composed of an aqueous alkali and an organic solvent immiscible with water.
    Type: Grant
    Filed: September 23, 1993
    Date of Patent: August 9, 1994
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Toshio Yamamoto, Kazumasa Hirata, Shigenori Wakabayashi, Akio Katsuura