Patents by Inventor Tetsuya ISAKA

Tetsuya ISAKA 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).

  • Ester compound and lubricating oil base oil
    Patent number: 11306053
    Abstract: [Problem] An ester compound having low viscosity, excellent fluidity even at low temperatures, and a high viscosity index; and a lubricating oil base oil containing said compound are provided. [Solution] The present invention provides an ester compound indicated by formula (I). Formula (I) (in formula (I), R1 is a hydrocarbon group having 1 to 35 carbon atoms and at least one hydrogen in the hydrocarbon group may be independently substituted with a group indicated by formula (II)). Formula (II) (in formula (II), R2 is a linear alkyl having 1 to 30 carbon atoms or a branched alkyl having 3 to 30 carbon atoms.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: April 19, 2022
    Assignees: DAISAN KASEI CO., LTD, JNC CORPORATION
    Inventors: Yasuo Urata, Tetsuya Isaka, Taichi Shimada
  • ESTER COMPOUND AND LUBRICATING OIL BASE OIL
    Publication number: 20210230096
    Abstract: [Problem] An ester compound having low viscosity, excellent fluidity even at low temperatures, and a high viscosity index; and a lubricating oil base oil containing said compound are provided. [Solution] The present invention provides an ester compound indicated by formula (I). Formula (I) (in formula (I), R1 is a hydrocarbon group having 1 to 35 carbon atoms and at least one hydrogen in the hydrocarbon group may be independently substituted with a group indicated by formula (II)). Formula (II) (in formula (II), R2 is a linear alkyl having 1 to 30 carbon atoms or a branched alkyl having 3 to 30 carbon atoms.
    Type: Application
    Filed: January 31, 2019
    Publication date: July 29, 2021
    Applicants: DAISAN KASEI CO., LTD, JNC CORPORATION
    Inventors: Yasuo URATA, Tetsuya ISAKA, Taichi SHIMADA