Patents by Inventor Keita Umetsu

Keita Umetsu 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).

  • Positive electrode coating liquid, positive electrode precursor, and nonaqueous lithium electric storage element
    Patent number: 11942621
    Abstract: Provided is a positive electrode precursor having a positive electrode active material layer, wherein the mass proportion A1 of a carbon material in the positive electrode active material layer accounts for 15-65 mass %, the mass proportion A2 of a lithium transition metal oxide in the positive electrode active material layer accounts for 5-35 mass %, the mass proportion A3 of an alkali metal compound in the positive electrode active material layer accounts for 10-50 mass %, A2/A1 is 0.10-2.00, A1/A3 is 0.50-3.00, and the positive electrode active material layer has a peel strength of 0.02-3.00 N/cm.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: March 26, 2024
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Kazuteru Umetsu, Keita Kusuzaka, Yuichiro Hirakawa, Nobuhiro Okada
  • Iodopropargyl derivatives and antimicrobial agents comprising them as an active ingredient
    Patent number: 6143311
    Abstract: The present invention provides novel iodopropargyl derivatives represented by the following formula (1): ##STR1## wherein R.sup.1 is a methoxy group or a cyano group, which have a reduced unpleasant smell and also have a wide antimicrobial spectrum and a high antimicrobial activity. Also, the present invention provides antimicrobial, antifungal and preservative or antimold agents comprising the above derivatives as an active ingredient.
    Type: Grant
    Filed: August 26, 1999
    Date of Patent: November 7, 2000
    Assignees: Nagase & Company, Ltd., Nagase Chemicals Ltd.
    Inventors: Yasuo Chikusa, Keita Umetsu, Shigeya Saijo, Masafumi Moriwaki, Toshimasa Ohnishi, Ikuya Tanaka, Yuji Yanagida