Patents by Inventor Tsunetoshi Egusa

Tsunetoshi Egusa 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).

  • Heat-sensitive recording material and diphenylsulfone
    Patent number: 10899153
    Abstract: The content of compound(s) having a molecular weight of 650-670, typically a molecular weight of 660, as measured by mass spectrometry, is reduced to 0.5 mass % or less in a heat-sensitive recording material comprising 3,3?-diallyl-4,4?-dihydroxy diphenylsulfone, or in a diphenylsulfone or a color-developing agent. Provided is, thereby, a heat-sensitive recording material, a color-developing agent, or a diphenylsulfone which cause less background fogging under moisture and heat conditions and which has excellent preservation stability of a colored image.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: January 26, 2021
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Tsunetoshi Egusa, Takashi Fujii, Hiroyuki Tsukui, Takaaki Kurata
  • Heat-Sensitive Recording Material And Diphenylsulfone
    Publication number: 20180312465
    Abstract: The content of compound(s) having a molecular weight of 650-670, typically a molecular weight of 660, as measured by mass spectrometry, is reduced to 0.5 mass % or less in a heat-sensitive recording material comprising 3,3?-diallyl-4,4?-dihydroxy diphenylsulfone, or in a diphenylsulfone or a color-developing agent. Provided is, thereby, a heat-sensitive recording material, a color-developing agent, or a diphenylsulfone which cause less background fogging under moisture and heat conditions and which has excellent preservation stability of a colored image.
    Type: Application
    Filed: November 15, 2016
    Publication date: November 1, 2018
    Inventors: Tsunetoshi Egusa, Takashi Fujii, Hiroyuki Tsukui, Takaaki Kurata