Patents by Inventor Norihiko Kakehi

Norihiko Kakehi 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).

  • Tetrazolyl-substituted pyrido[1,2-a]pyrimidines and use as SRS-A antagonists
    Patent number: 4816459
    Abstract: Pyrido[1,2-a]pyrimidine derivatives of the general formula [I] and their physiologically acceptable salts are provided: ##STR1## where R is a hydrogen atom, a halogen atom or a methyl group, and n is a whole number of 0, 1 or 2. The pyrido[1,2-a]-pyrimidine derivatives and their salts exhibit an excellent antagonistic effect on slow-reacting substance of anaphylaxis and, therefore, are useable for the treatment of allergic diseases.
    Type: Grant
    Filed: October 1, 1986
    Date of Patent: March 28, 1989
    Assignee: Tokyo Tanabe Co. Ltd.
    Inventors: Naoto Matsuishi, Yoshio Nakagawa, Michiaki Amano, Norihiko Kakehi, Toshio Kawashima, Shigeki Omura
  • Pyrido[1,2-a]pyrimidine compounds, corresponding intermediates and use as SRS-A antagonists
    Patent number: 4798832
    Abstract: Pyrido[1,2-a]pyrimidine derivatives of the general formula [I] and their physiologically acceptable salts are provided: ##STR1## where R is a hydrogen atom, a halogen atom or a methyl group, and n is 0, 1 or 2. The pyrido[1,2-a]pyrimidine derivatives and their salts exhibit an excellent antagonistic effect on slow-reacting substance of anaphylaxis and, therefore, are useable for the treatment of allergic diseases.
    Type: Grant
    Filed: April 13, 1987
    Date of Patent: January 17, 1989
    Assignee: Tokyo Tanabe Company, Limited
    Inventors: Naoto Matsuishi, Yoshio Nakagawa, Michiaki Amano, Norihiko Kakehi, Toshio Kawashima, Shigeki Omura