Patents by Inventor Nanako Okamoto

Nanako Okamoto 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).

  • Developer mixture for thermal recording materials and thermal recording materials
    Patent number: 8062993
    Abstract: The present invention relates to a developer mixture for a thermal recording material, which comprises a mixture of the first organic developer comprising a condensate or a condensed composition represented by the formula (I): wherein R is a lower alkyl group or an aralkyl group, n is an integer of 0 to 5, and X and Y are each a hydrogen atom, an alkyl group or an aryl group, and the second organic developer other than the first organic developer (except 2,2-bis(3-methyl-4-hydroxyphenyl)propane), a developer mixture for a thermal recording material, and a thermal recording material having a heat-coloring layer containing the developer mixture. Using the developer mixture for a thermal recording material of the present invention, a thermal recording material sufficiently satisfying the recent requirement for high sensitivity, and having superior preservation stability of color images and non-image areas can be realized.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: November 22, 2011
    Assignees: API Corporation, Nippon Paper Industries Co., Ltd.
    Inventors: Mamoru Suga, Nanako Okamoto, Aya Kato, Takashi Date, Yoshihide Kimura
  • Developer mixture for thermal recording materials and thermal recording materials
    Publication number: 20070173407
    Abstract: The present invention relates to a developer mixture for a thermal recording material, which comprises a mixture of the first organic developer comprising a condensate or a condensed composition represented by the formula (I): wherein R is a lower alkyl group or an aralkyl group, n is an integer of 0 to 5, and X and Y are each a hydrogen atom, an alkyl group or an aryl group, and the second organic developer other than the first organic developer (except 2,2-bis(3-methyl-4-hydroxyphenyl)propane), a developer mixture for a thermal recording material, and a thermal recording material having a heat-coloring layer containing the developer mixture. Using the developer mixture for a thermal recording material of the present invention, a thermal recording material sufficiently satisfying the recent requirement for high sensitivity, and having superior preservation stability of color images and non-image areas can be realized.
    Type: Application
    Filed: March 11, 2005
    Publication date: July 26, 2007
    Applicants: API CORPORATION, NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Mamoru Suga, Nanako Okamoto, Aya Kato, Takashi Date, Yoshihide Kimura