Patents by Inventor Utako Takeda

Utako Takeda 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).

  • AZO compound and ink containing the compound
    Patent number: 9200171
    Abstract: An object of the present invention is to provide an ink containing an azo compound which is excellent in solubility in a solvent and has a high extinction coefficient. The present invention relates to an ink comprising a solvent having a relative permittivity of 3 or less, as measured at a frequency of 1 kHz and at 22° C. and having a solubility in water of 20 mg/L or less at 25° C. and a specific azo compound.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: December 1, 2015
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Utako Takeda, Shoko Ichinosawa, Yuki Tanaka, Hiroyuki Aikyo, Mio Ishida
  • Ink containing anthraquinone based dye, dye used in the ink, and display
    Patent number: 8999050
    Abstract: An object of the present invention is to provide an anthraquinone based dye having excellent solubility in a low polar solvent and having high absorption coefficient and high light resistance and an ink containing the same. The present invention relates to an ink comprising a specific anthraquinone based dye.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: April 7, 2015
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Mio Ishida, Yasushi Shiga, Utako Takeda, Masami Kadowaki
  • Ink containing heterocyclic azo dye, and dye for use in said ink
    Patent number: 8747537
    Abstract: The invention relates to an ink which comprises: a low-polarity solvent having a relative permittivity of 3 or less at a measuring frequency of 1 kHz; and a specific heterocyclic azo dye.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: June 10, 2014
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yasushi Shiga, Utako Takeda, Shoko Ichinosawa, Mio Ishida
  • AZO COMPOUND AND INK CONTAINING THE COMPOUND
    Publication number: 20140078577
    Abstract: An object of the present invention is to provide an ink containing an azo compound which is excellent in solubility in a solvent and has a high extinction coefficient. The present invention relates to an ink comprising a solvent having a relative permittivity of 3 or less, as measured at a frequency of 1 kHz and at 22° C. and having a solubility in water of 20 mg/L or less at 25° C. and a specific azo compound.
    Type: Application
    Filed: November 20, 2013
    Publication date: March 20, 2014
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Utako TAKEDA, Shoko Ichinosawa, Yuki Tanaka, Hiroyuki Aikyo, Mio Ishida
  • INK CONTAINING ANTHRAQUINONE BASED DYE, DYE USED IN THE INK, AND DISPLAY
    Publication number: 20130241815
    Abstract: An object of the present invention is to provide an anthraquinone based dye having excellent solubility in a low polar solvent and having high absorption coefficient and high light resistance and an ink containing the same. The present invention relates to an ink comprising a specific anthraquinone based dye.
    Type: Application
    Filed: September 10, 2012
    Publication date: September 19, 2013
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Mio ISHIDA, Yasushi Shiga, Utako Takeda, Masami Kadowaki