Patents by Inventor Hiroki SUMI

Hiroki SUMI 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 FLUORENONE
    Publication number: 20230406800
    Abstract: A method for producing fluorenone including a pretreatment step of heating fluorene in the presence of a lower aliphatic carboxylic acid, a bromine compound, and a metal catalyst, and an oxidation step of continuously supplying fluorene and oxygen to perform an oxidation reaction, in the order indicated.
    Type: Application
    Filed: November 4, 2021
    Publication date: December 21, 2023
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Yuki WATANABE, Hiroki SUMI, Hideaki FUJITA, Goh NAKAMURA, Tatsuyuki KUMANO
  • METHOD FOR PRODUCING FLUORENONE
    Publication number: 20230391705
    Abstract: Provided is a method for producing fluorenone comprising an oxidation step of oxidizing fluorene in the presence of an aliphatic carboxylic acid having 2 to 3 carbon atoms, a metal catalyst, a bromine compound, and oxygen, a solvent removal step of removing the aliphatic carboxylic acid, a heating step at 120 to 350° C., and a distillation step in the order indicated.
    Type: Application
    Filed: October 21, 2021
    Publication date: December 7, 2023
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Hiroki SUMI, Yuki WATANABE, Hideaki FUJITA, Goh NAKAMURA, Tatsuyuki KUMANO