Patents by Inventor Tsutomu Yonemori

Tsutomu Yonemori 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).

  • SILICA PARTICLE, SILICA SOL, POLISHING COMPOSITION, POLISHING METHOD, METHOD FOR PRODUCING SEMICONDUCTOR WAFER, AND METHOD FOR PRODUCING SEMICONDUCTOR DEVICE
    Publication number: 20220363554
    Abstract: An object of the present invention is to provide a silica particle, a silica sol containing the silica particle, and a polishing composition containing the silica sol, which prevent secondary aggregation, have excellent dispersion stability, and are suitable for polishing. The present invention relates to a silica particle in which an average value of a circularity coefficient measured by a field-emission scanning electron microscope is 0.90 or more, and a standard deviation of the circularity coefficient is 0.05 or less.
    Type: Application
    Filed: July 26, 2022
    Publication date: November 17, 2022
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Naoko SUMITANI, Tsutomu YONEMORI, Eiji DEJIMA, Yasuhiro KAWASE
  • Method for preparing an oxime
    Patent number: 5254734
    Abstract: A method for preparing an oxime, which comprises partitioning an aqueous hydroxylamine salt solution phase and a ketone or aldehyde phase by a cation exchange membrane, and permitting hydroxylamine in the aqueous hydroxylamine salt solution phase to diffuse and transfer through the membrane to the ketone or aldehyde phase and to form an oxime in the ketone or aldehyde phase.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: October 19, 1993
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Yu Kanda, Takeshi Matsuoka, Haruo Habu, Tsutomu Yonemori