Patents by Inventor Hirofumi Aizono

Hirofumi Aizono 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).

  • Publication number: 20120133882
    Abstract: The present invention provides a liquid crystal film which comprises a liquid crystal layer having excellent retainability of homeotropic alignment and which has excellent interlayer adhesion between a cycloolefin polymer (COP) film and the liquid crystal layer. The liquid crystal film is produced by aligning homeotropically a liquid crystalline composition containing a (meth)acrylic compound having an oxetane group and fixing the composition in a homeotropic alignment by polymerizing the oxetane group directly on the COP film. The liquid crystal film is excellent in interlayer adhesion. The present invention also provides an optical element produced using the liquid crystal film.
    Type: Application
    Filed: March 11, 2010
    Publication date: May 31, 2012
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Hirofumi Aizono, Tomoo Hirai
  • Patent number: 7998543
    Abstract: A novel dioxetane compound is provided having a cationically polymerizable oxetane group, which compound is excellent in compatibility with a liquid crystalline compound and a non-liquid crystalline compound. An optical film is also provided with excellent liquid crystal orientation retention properties and mechanical strength, produced by aligning a composition of the dioxetane compound and a cationically polymerizable compound in a liquid crystal orientation and fixing the liquid crystal orientation by polymerization. Further, a liquid crystal display device is provided with the optical film.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: August 16, 2011
    Assignee: Nippon Oil Corporation
    Inventors: Takashi Seki, Takeshi Kataoka, Hitoshi Mazaki, Hirofumi Aizono
  • Publication number: 20090068379
    Abstract: A novel dioxetane compound is provided having a cationically polymerizable oxetane group, which compound is excellent in compatibility with a liquid crystalline compound and a non-liquid crystalline compound. An optical film is also provided with excellent liquid crystal orientation retention properties and mechanical strength, produced by aligning a composition of the dioxetane compound and a cationically polymerizable compound in a liquid crystal orientation and fixing the liquid crystal orientation by polymerization. Further, a liquid crystal display device is provided with the optical film.
    Type: Application
    Filed: October 17, 2006
    Publication date: March 12, 2009
    Applicant: NIPPON OIL CORPORATION
    Inventors: Takashi Seki, Takeshi Kataoka, Hitoshi Mazaki, Hirofumi Aizono
  • Patent number: 7303695
    Abstract: A process is provided for producing efficiently an optically active liquid crystalline polymer compound excellent in mechanical strength or optical characteristics at low cost, in which in that a liquid crystal polymer compound having in its main chain or side chain an ester bond is reacted with an optically active low molecular weight compound having a hydroxyl group so as to introduce the low molecular weight compound in the polymer compound as a unit having an optically active group.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: December 4, 2007
    Assignee: Nippon Oil Corporation
    Inventors: Hitoshi Mazaki, Hirofumi Aizono
  • Publication number: 20060157672
    Abstract: A process is provided for producing efficiently an optically active liquid crystalline polymer compound excellent in mechanical strength or optical characteristics at low cost, in which in that a liquid crystal polymer compound having in its main chain or side chain an ester bond is reacted with an optically active low molecular weight compound having a hydroxyl group so as to introduce the low molecular weight compound in the polymer compound as a unit having an optically active group.
    Type: Application
    Filed: March 27, 2006
    Publication date: July 20, 2006
    Inventors: Hitoshi MAZAKI, Hirofumi Aizono
  • Patent number: 5808169
    Abstract: A process for preparing 1,2,4,5-dimethyldiisopropylbenzene includes conducting alkylation of p-xylene with propylene to produce an alkylation product, and crystallizing the alkylation product. A heteropolyacid-supported catalyst can be used as an alkylation catalyst for the reaction. The reaction solution produced from the alkylation reaction can be distilled before crystallization to improve yield and purity even more.
    Type: Grant
    Filed: August 18, 1997
    Date of Patent: September 15, 1998
    Assignee: Mitsubishi Oil Co., Ltd.
    Inventors: Hirofumi Aizono, Takeshi Kouchi, Kazuto Hironaga