Patents by Inventor Naoto HAMA

Naoto HAMA 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).

  • Method for producing tetracyclic compound
    Patent number: 11939322
    Abstract: This invention relates to a method for manufacturing 9-ethyl-6,6-dimethyl-8-[4-(morpholin-4-yl)piperidin-1-yl]-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile, and is industrially preferable, allowing an objective substance to be obtained in high yield more safely and easily than the conventional method.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: March 26, 2024
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Hiroki Serizawa, Akira Kawase, Hiroshi Fukuda, Naoto Hama
  • METHOD FOR PRODUCING TETRACYCLIC COMPOUND
    Publication number: 20220372025
    Abstract: This invention relates to a method for manufacturing 9-ethyl-6,6-dimethyl-8-[4-(morpholin-4-yl)piperidin-1-yl]-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile, and is industrially preferable, allowing an objective substance to be obtained in high yield more safely and easily than the conventional method.
    Type: Application
    Filed: September 3, 2019
    Publication date: November 24, 2022
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Hiroki SERIZAWA, Akira KAWASE, Hiroshi FUKUDA, Naoto HAMA