Patents by Inventor Hiroyuki Aikyo

Hiroyuki Aikyo 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
  • 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
  • Activated carbon and process for producing the same
    Patent number: 5965479
    Abstract: The present invention relates to an activated carbon comprising an activated carbon particle and titanium dioxide fine particles present at least on the surface thereof, which activated carbon contains substantially no carbon precursor on the surface thereof and has the lightness L value thereof of not more than 50.
    Type: Grant
    Filed: August 1, 1997
    Date of Patent: October 12, 1999
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Mitsuo Suzuki, Hiroyuki Aikyo, Satoshi Hirahara, Kazushi Matsuura, Kohei Okuyama
  • Pitch-type carbon fibers and process for their production
    Patent number: 5643546
    Abstract: A pitch-type carbon fiber made from a pitch having 1 a glass transition temperature width of at most 40.degree. C. as measured by a differential scanning calorimeter, 2 a proportion of the optically anisotropic phase of at least 10% by volume, and 3 a quinoline-insoluble content of at most 5% by weight, as a spinning raw material pitch.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: July 1, 1997
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Iwao Yamamoto, Hiroyuki Aikyo, Akihiko Yoshiya, Kazuo Shirosaki
  • Carbon fibers and process for their production
    Patent number: 5620674
    Abstract: A carbon fiber having a fiber diameter of at least 15 .mu.m, a tensile modulus of elasticity of more than 104 ton/mm.sup.2 and a spread L of graphite crystallites in the direction of axis a of at least 1,000 .ANG. as determined from the powder X-ray spectrum.
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: April 15, 1997
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Iwao Yamamoto, Hiroyuki Aikyo
  • Carbon fibers and process for their production
    Patent number: 5612015
    Abstract: A carbon fiber which, when baked at a temperature of at least 3,000.degree. C., will have a spread La of graphite crystallites in the layer plane direction of more than 1,000.ANG., an electrical specific resistance of less than 1.1 .mu..OMEGA.m and a thermal conductivity of more than 1,100 W/m.multidot.K.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: March 18, 1997
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Iwao Yamamoto, Hiroyuki Aikyo
  • Pitch type carbon fibers and process for their production
    Patent number: 5601794
    Abstract: A pitch-type carbon fiber made from a pitch having 1 a glass transition temperature width of at most 40.degree.C. as measured by a differential scanning calorimeter, 2 a proportion of the optically anisotropic phase of at least 10% by volume, and 3 a quinoline-insoluble content of at most 5% by weight, as a spinning raw material pitch.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: February 11, 1997
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Iwao Yamamoto, Hiroyuki Aikyo, Akihiko Yoshiya, Kazuo Shirosaki