Patents by Inventor Masayuki Iwakubo

Masayuki Iwakubo 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: 20200071617
    Abstract: “Object” To provide a tilt-imparted liquid crystal display element that is obtained through UV irradiation of a polymerizable liquid crystal composition, whose drive voltage can be reduced with a fast decay time maintained, and that is well balanced between characteristics, such as decay time, drive voltage, and transmittance. A polymerizable liquid crystal composition for use in it is also provided. “Solution” A liquid crystal display element has polymer networks formed in the liquid crystal phase 5 in FIG. 3. The polymer networks are formed by polymerizing a polymerizable liquid crystal composition that contains, as essential ingredients, a radically polymerizable monomer component (A), a liquid crystal material (B), and a polymerization initiator (C) that has a molecular structure resulting from substituting any two or more hydrogen atoms in the aromatic nucleus in the molecular structure of an alkylphenone-based photopolymerization initiator, for example with a C1-10 alkyl group (i).
    Type: Application
    Filed: September 26, 2017
    Publication date: March 5, 2020
    Applicant: DIC Corporation
    Inventors: Toru Fujisawa, Masayuki Iwakubo, Hiroshi Hasebe, Fumiaki Kodera, Keumhee Jang
  • Patent number: 10336939
    Abstract: Provided are a compound represented by general formula (I), a liquid crystal composition that uses the compound, and a liquid crystal display device that uses the liquid crystal composition. Adding the compound represented by general formula (I) to a liquid crystal composition can prevent degradation of the liquid crystal composition by light, heat, etc. The compound represented by general formula (I) dissolves well in the liquid crystal composition. Thus, when the compound represented by general formula (I) is used, a liquid crystal composition having both low viscosity (?) and high reliability can be prepared, and a high-speed response liquid crystal display device can be provided.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: July 2, 2019
    Assignee: DIC CORPORATION
    Inventors: Masayuki Iwakubo, Sayaka Nose, Manabu Takachi, Yoshio Aoki
  • Publication number: 20180223188
    Abstract: Provided are a compound represented by general formula (I), a liquid crystal composition that uses the compound, and a liquid crystal display device that uses the liquid crystal composition. Adding the compound represented by general formula (I) to a liquid crystal composition can prevent degradation of the liquid crystal composition by light, heat, etc. The compound represented by general formula (I) dissolves well in the liquid crystal composition. Thus, when the compound represented by general formula (I) is used, a liquid crystal composition having both low viscosity (?) and high reliability can be prepared, and a high-speed response liquid crystal display device can be provided.
    Type: Application
    Filed: June 23, 2016
    Publication date: August 9, 2018
    Applicant: DIC Corporation
    Inventors: Masayuki Iwakubo, Sayaka Nose, Manabu Takachi, Yoshio Aoki
  • Patent number: 9939555
    Abstract: Provided is a liquid crystal alignment layer of which a constituent member is a compound represented by the general formula (I).
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: April 10, 2018
    Assignee: DIC CORPORATION
    Inventors: Martin Schadt, Sayaka Nose, Masayuki Iwakubo, Masanao Hayashi, Yutaka Nagashima, Isa Nishiyama, Haruyoshi Takatsu
  • Patent number: 9688787
    Abstract: An object of the invention is to provide a polymerizable compound having small refractive index anisotropy and having high storage stability and high alignment properties when constituting a polymerizable liquid crystal composition, and provide a polymerizable liquid crystal composition containing the polymerizable compound. Further, the object is to provide a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer. The present invention provides a polymerizable compound represented by general formula (I), a polymerizable liquid crystal composition containing the compound as a constituent component, and further provides a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: June 27, 2017
    Assignee: DIC CORPORATION
    Inventors: Tetsuo Kusumoto, Masahiro Horiguchi, Takashi Matsumoto, Yoshio Aoki, Masanao Hayashi, Masayuki Iwakubo
  • Patent number: 9684206
    Abstract: Provided is a liquid crystal alignment layer of which a constituent member is a polymer represented by the general formula (I).
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: June 20, 2017
    Assignee: DIC CORPORATION
    Inventors: Martin Schadt, Vladimir Grigorievich Chigrinov, Hoi-Sing Kwok, Sayaka Nose, Masayuki Iwakubo, Masanao Hayashi, Yutaka Nagashima, Isa Nishiyama, Haruyoshi Takatsu
  • Publication number: 20150361190
    Abstract: An object of the invention is to provide a polymerizable compound having small refractive index anisotropy and having high storage stability and high alignment properties when constituting a polymerizable liquid crystal composition, and provide a polymerizable liquid crystal composition containing the polymerizable compound. Further, the object is to provide a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer. The present invention provides a polymerizable compound represented by general formula (I), a polymerizable liquid crystal composition containing the compound as a constituent component, and further provides a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer.
    Type: Application
    Filed: August 14, 2015
    Publication date: December 17, 2015
    Applicant: DIC CORPORATION
    Inventors: Tetuo Kusumoto, Masahiro Horiguchi, Takashi Matsumoto, Yoshio Aoki, Masanao Hayashi, Masayuki Iwakubo
  • Patent number: 9120883
    Abstract: An object of the invention is to provide a polymerizable compound having small refractive index anisotropy and having high storage stability and high alignment properties when constituting a polymerizable liquid crystal composition, and provide a polymerizable liquid crystal composition containing the polymerizable compound. Further, the object is to provide a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer. The present invention provides a polymerizable compound represented by general formula (I), a polymerizable liquid crystal composition containing the compound as a constituent component, and further provides a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: September 1, 2015
    Assignee: DIC CORPORATION
    Inventors: Tetuo Kusumoto, Masahiro Horiguchi, Takashi Matsumoto, Yoshio Aoki, Masanao Hayashi, Masayuki Iwakubo
  • Publication number: 20140221574
    Abstract: Provided is a liquid crystal alignment layer of which a constituent member is a polymer represented by the general formula (I).
    Type: Application
    Filed: June 27, 2012
    Publication date: August 7, 2014
    Applicant: DIC CORPORATION
    Inventors: Martin Schadt, Vladimir Grigorievich Chigrinov, Hoi-Sing Kwok, Sayaka Nose, Masayuki Iwakubo, Masanao Hayashi, Yutaka Nagashima, Isa Nishiyama, Haruyoshi Takatsu
  • Publication number: 20140121345
    Abstract: Provided is a liquid crystal alignment layer of which a constituent member is a compound represented by the general formula (I).
    Type: Application
    Filed: May 31, 2012
    Publication date: May 1, 2014
    Applicant: DIC CORPORATION
    Inventors: Martin Schadt, Sayaka Nose, Masayuki Iwakubo, Masanao Hayashi, Yutaka Nagashima, Isa Nishiyama, Haruyoshi Takatsu
  • Publication number: 20140080990
    Abstract: An object of the invention is to provide a polymerizable compound having small refractive index anisotropy and having high storage stability and high alignment properties when constituting a polymerizable liquid crystal composition, and provide a polymerizable liquid crystal composition containing the polymerizable compound. Further, the object is to provide a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer. The present invention provides a polymerizable compound represented by general formula (I), a polymerizable liquid crystal composition containing the compound as a constituent component, and further provides a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer.
    Type: Application
    Filed: April 5, 2012
    Publication date: March 20, 2014
    Applicant: DIC CORPORATION
    Inventors: Tetuo Kusumoto, Masahiro Horiguchi, Takashi Matsumoto, Yoshio Aoki, Masanao Hayashi, Masayuki Iwakubo
  • Patent number: 7670504
    Abstract: The present invention provides a liquid crystal composition having a negative dielectric anisotropy whose absolute value is large, and a low viscosity, and also provides a VA type liquid crystal element using the same. Disclosed is a liquid crystal composition containing a compound represented by the general formula (I) and an alkenyl compound represented by the general formula (II): By combining the liquid compounds according to the present invention, a liquid crystal composition having a low viscosity and a negative dielectric anisotropy could be obtained while nearly maintaining physical properties such as refractive anisotropy. By using the composition, a liquid crystal element having excellent reliability, capable of maintaining a high voltage retention until a high temperature region, is provided, and the display is very applicable as a VA type, ECB type, or IPS type liquid crystal display, and is particularly effective for speeding up response without thinning cell gaps.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: March 2, 2010
    Assignee: Dainippon Ink & Chemicals, Inc.
    Inventors: Shotaro Kawakami, Takashi Matsumoto, Tetsuo Kusumoto, Yoshitaka Saito, Yutaka Nagashima, Makoto Negishi, Masayuki Iwakubo
  • Patent number: 7651630
    Abstract: A nematic liquid crystal composition of the present invention includes 10 to 80% by mass of either one or at least two compounds represented by general formula (I) as a first component; and 20 to 70% by mass of either one or at least two compounds represented by general formula (II) as a second component, wherein a dielectric constant anisotropy is negative. The use of this nematic liquid crystal composition can provide a highly reliable liquid crystal display element capable of maintaining a high voltage-holding ratio even in a high temperature region, and achieving quick responsiveness without reducing the cell gap.
    Type: Grant
    Filed: February 27, 2006
    Date of Patent: January 26, 2010
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Shotaro Kawakami, Takashi Matsumoto, Tetsuo Kusumoto, Yoshitaka Saito, Yutaka Nagashima, Makoto Negishi, Masayuki Iwakubo
  • Patent number: 7615564
    Abstract: An objective of the present invention is to provide compounds having Rho kinase inhibitory activity and useful for the treatment of diseases mediated by Rho kinase. The compounds according to the present invention are those represented by formula (I) or pharmaceutically acceptable salts or solvates thereof: wherein Q represents phenyl, pyridyl, pyrrolyl, thienyl, or furyl; these groups are optionally substituted by one or two halogens or alkyl, nitro, or amino groups; and p is 2 or 3.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: November 10, 2009
    Assignee: Kirin Beer Kabushiki Kaisha
    Inventors: Masayuki Iwakubo, Yuji Okada
  • Publication number: 20090050843
    Abstract: A nematic liquid crystal composition of the present invention includes 10 to 80% by mass of either one or at least two compounds represented by general formula (I) as a first component; and 20 to 70% by mass of either one or at least two compounds represented by general formula (II) as a second component, wherein a dielectric constant anisotropy is negative. The use of this nematic liquid crystal composition can provide a highly reliable liquid crystal display element capable of maintaining a high voltage-holding ratio even in a high temperature region, and achieving quick responsiveness without reducing the cell gap.
    Type: Application
    Filed: February 27, 2006
    Publication date: February 26, 2009
    Applicant: DAINIPPON INK AND CHEMICALS, INC.
    Inventors: Shotaro Kawakami, Takashi Matsumoto, Tetsuo Kusumoto, Yoshitaka Saito, Yutaka Nagashima, Makoto Negishi, Masayuki Iwakubo
  • Publication number: 20080111107
    Abstract: The present invention provides a liquid crystal composition having a negative dielectric anisotropy whose absolute value is large, and a low viscosity, and also provides a VA type liquid crystal element using the same. Disclosed is a liquid crystal composition containing a compound represented by the general formula (I) and an alkenyl compound represented by the general formula (II): By combining the liquid compounds according to the present invention, a liquid crystal composition having a low viscosity and a negative dielectric anisotropy could be obtained while nearly maintaining physical properties such as refractive anisotropy. By using the composition, a liquid crystal element having excellent reliability, capable of maintaining a high voltage retention until a high temperature region, is provided, and the display is very applicable as a VA type, ECB type, or IPS type liquid crystal display, and is particularly effective for speeding up response without thinning cell gaps.
    Type: Application
    Filed: December 14, 2005
    Publication date: May 15, 2008
    Inventors: Shotaro Kawakami, Takashi Matsumoto, Tetsuo Kusumoto, Yoshitaka Saito, Yutaka Nagashima, Makoto Negishi, Masayuki Iwakubo
  • Patent number: 7217722
    Abstract: An objective of the present invention is to provide compounds having Rho kinase inhibitory activity. The compounds according to the present invention are those represented by formula (I) or pharmaceutically acceptable salts or solvates thereof: Het—X—Z??(I) wherein Het represents a monocyclic or bicyclic heterocyclic group containing at least one nitrogen atom, for example, pyridyl or phthalimide; X represents group (i) —NH—C(?O)—NH—Q1-, group (ii) —NH—C(?O)—Q2-, wherein Q1 and Q2 represent a bond, alkylene, or alkenylene, or the like; and Z represents hydrogen, halogen, a monocyclic, bicyclic, or tricyclic carbocyclic group, a heterocyclic group or the like, for example, optionally substituted phenyl.
    Type: Grant
    Filed: January 2, 2001
    Date of Patent: May 15, 2007
    Assignee: Kirin Beer Kabushiki Kaisha
    Inventors: Atsuya Takami, Hiroshi Iijima, Masayuki Iwakubo, Yuji Okada
  • Publication number: 20060167043
    Abstract: An objective of the present invention is to provide compounds having Rho kinase inhibitory activity and useful for the treatment of diseases mediated by Rho kinase. The compounds according to the present invention are those represented by formula (I) or pharmaceutically acceptable salts or solvates thereof: wherein Q represents phenyl, pyridyl, pyrrolyl, thienyl, or furyl; these groups are optionally substituted by one or two halogens or alkyl, nitro, or amino groups; and p is 2 or 3.
    Type: Application
    Filed: September 12, 2003
    Publication date: July 27, 2006
    Applicant: KIRIN BEER KABUSHIKI KAISHA
    Inventors: Masayuki Iwakubo, Yuji Okada
  • Publication number: 20040102437
    Abstract: Compounds having an Rho kinase inhibitory activity. These compounds include the compound of general formula (I): Het-X-Z, pharmaceutically acceptable salts thereof and solvates of the same, wherein Het represents a monocyclic or dicyclic heterocycle group containing at least one nitrogen atom (for example, pyridyl, phthalimido); X represents (i) an —NH—C(═O)—NH-Q1- group, (ii) an —NH—C(═O)-Q2- group, etc. (wherein Q1 and Q2 represent each a bond, alkylene or alkenylene); and Z represents hydrogen, halogeno, a monocyclic, dicyclic ortricyclic carbon cycle or heterocycle, etc. (for example, optionally substituted phenyl).
    Type: Application
    Filed: May 19, 2003
    Publication date: May 27, 2004
    Inventors: Atsuya Takami, Hiroshi Iijima, Masayuki Iwakubo, Yuji Okada