Patents by Inventor Kenshin Hayashi

Kenshin Hayashi 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 for producing 7-(substituted)amino-3-substituted thiomethyl cephem carboxylic acids
    Patent number: 4385178
    Abstract: This disclosure relates to a novel process for producing 7-(substituted)amino-3-substituted thiomethyl cephem carboxylic acids which are intermediate products of cephalosporins being valuable antibacterial compounds for use in mammals including man.
    Type: Grant
    Filed: December 17, 1981
    Date of Patent: May 24, 1983
    Assignee: Toyama Chemical Co., Ltd.
    Inventors: Isamu Saikawa, Shuntaro Takano, Kaishu Momonoi, Isamu Takakura, Seietsu Kuroda, Kiyoshi Tanaka, Kenshin Hayashi, Bunei Nagahashi, Chiaki Kutani
  • Process for producing 7-(substituted)amino-3-substituted thiomethyl cephem carboxylic acids
    Patent number: 4317907
    Abstract: This disclosure relates to a novel process for producing 7-(substituted)amino-3-substituted thiomethyl cephem carboxylic acids which are intermediate products of cephalosporins being valuable antibacterial compounds for use in mammals including man.
    Type: Grant
    Filed: February 2, 1978
    Date of Patent: March 2, 1982
    Assignee: Toyama Chemical Co., Ltd.
    Inventors: Isamu Saikawa, Shuntaro Takano, Kaishu Momonoi, Isamu Takakura, Seietsu Kuroda, Kiyoshi Tanaka, Kenshin Hayashi, Bunei Nagahashi, Chiaki Kutani
  • Process for producing 7-(substituted)amino-3-substituted thiomethyl-.DELTA..sup.3 -cephem-4-carboxylic acids
    Patent number: 4312986
    Abstract: This disclosure relates to a novel process for producing 7-(substituted)-amino-3-substituted thiomethyl-.DELTA..sup.3 -cephem-4-carboxylic acids which are intermediate products of cephalosporins being valuable antibacterial compounds for use in mammals including man.
    Type: Grant
    Filed: July 5, 1979
    Date of Patent: January 26, 1982
    Assignee: Toyama Chemical Co., Ltd.
    Inventors: Isamu Saikawa, Shuntaro Takano, Kaishu Momonoi, Isamu Takakura, Seietsu Kuroda, Kiyoshi Tanaka, Kenshin Hayashi, Bunei Nagahashi, Chiaki Kutani
  • Process for producing 7-(D(-)-.alpha.-(4-ethyl-2,3-dioxo-1-piperazinecarboxamido)-.alpha.-(4-h ydroxyphenyl)acetamido)-3-(5-(1-methyl-1,2,3,4-tetrazolyl)thiomethyl)-.DELT A..sup.3 -cephem-4-carboxylic acid and a pharmaceutically acceptable salt thereof
    Patent number: 4304909
    Abstract: The N,N-dimethylacetamide adduct of 7-[D(-)-.alpha.-(4-ethyl-2,3-dioxo-1-piperazinecarboxamido)-.alpha.-(4-hyd roxyphenyl)acetamido]-3-[5-(1-methyl-1,2,3,4-tetrazolyl)thiomethyl]-.DELTA. .sup.3 -cephem-4-carboxylic acid, a process for the production thereof, and a process for producing said acid and a pharmaceutically acceptable salt thereof through said adduct.
    Type: Grant
    Filed: August 24, 1979
    Date of Patent: December 8, 1981
    Assignee: Toyama Chemical Co., Ltd.
    Inventors: Isamu Saikawa, Shuntaro Takano, Kaishu Momonoi, Isamu Takakura, Chiaki Kutani, Kiyoshi Tanaka, Kenshin Hayashi
  • Intermediate for cephalosporin type compound
    Patent number: 4237280
    Abstract: The N,N-dimethylacetamide adduct of 7-[D(-)-.alpha.-(4-ethyl-2,3-dioxo-1-piperazinecarboxamido)-.alpha.-(4-hyd roxyphenyl)acetamido]-3-[5-(1-methyl-1,2,3,4-tetrazolyl)thiomethyl]-.DELTA. .sup.3 -cephem-4-carboxylic acid, a process for the production thereof, and a process for producing said acid and a pharmaceutically acceptable salt thereof through said adduct.
    Type: Grant
    Filed: September 25, 1978
    Date of Patent: December 2, 1980
    Assignee: Toyama Chemical Company, Limited
    Inventors: Isamu Saikawa, Shuntaro Takano, Kaishu Momonoi, Isamu Takakura, Chiaki Kutani, Kiyoshi Tanaka, Kenshin Hayashi