Patents by Inventor Mayumi KISHI

Mayumi KISHI 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).

  • Bismuth compound, curable composition and cured product
    Patent number: 11186600
    Abstract: A bismuth compound which is little toxic, insoluble in a monomer, usable for optical purpose and used as a substitute for a lead compound, in which a phosphoric acid ester having a (meth)acrylic group(s) is bonded to bismuth, and a method of producing the bismuth compound by reacting bismuth (meth)acrylate or bismuth subsalicylate with a phosphoric acid ester having a (meth)acrylic group(s) and carrying out dehydration.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: November 30, 2021
    Assignee: TOKUYAMA CORPORATION
    Inventors: Takayoshi Kawasaki, Junji Momoda, Tomohiro Kawamura, Mayumi Kishi, Michihito Nakatani
  • BISMUTH COMPOUND, CURABLE COMPOSITION AND CURED PRODUCT
    Publication number: 20210070790
    Abstract: A bismuth compound which is little toxic, insoluble in a monomer, usable for optical purpose and used as a substitute for a lead compound, in which a phosphoric acid ester having a (meth)acrylic group(s) is bonded to bismuth, and a method of producing the bismuth compound by reacting bismuth (meth)acrylate or bismuth subsalicylate with a phosphoric acid ester having a (meth)acrylic group(s) and carrying out dehydration.
    Type: Application
    Filed: March 14, 2019
    Publication date: March 11, 2021
    Applicant: TOKUYAMA CORPORATION
    Inventors: Takayoshi KAWASAKI, Junji MOMODA, Tomohiro KAWAMURA, Mayumi KISHI, Michihito NAKATANI