Patents by Inventor Michiko Sawada

Michiko Sawada 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).

  • Patent number: 10975305
    Abstract: To provide a compound having an effect of preventing photodegradation of a liquid crystal composition and high solubility in a liquid crystal composition, a liquid crystal composition containing the compound, and a liquid crystal display element containing the composition. There are provided a compound represented by M(Z-Q)m, a liquid crystal composition containing the compound, and a liquid crystal display element using the composition. Here, m is 3, 4, or 5; M is a trivalent, tetravalent, or pentavalent cyclic group, an organic group, or a group constituted by trivalent nitrogen; Z is a single bond, —O—, —COO—, or —OCO—; and Q is a monovalent group represented by Formula (Q-1): in Formula (Q-1), Ra is a hydrogen atom, —O., —OH, an alkyl group, or an alkenyl group, a terminal group (—CH3) is optionally substituted with —NHR2 or —NR3R4, and here R3 and R4 are an alkyl group.
    Type: Grant
    Filed: December 25, 2018
    Date of Patent: April 13, 2021
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Kazuo Okumura, Michiko Sawada
  • Patent number: 10570334
    Abstract: Shown is a bimesogenic compound having high solubility in a liquid crystal compound, a liquid crystal composition, a chiral dopant, an additive including an antioxidant or an ultraviolet light absorber, and a polymerizable liquid crystal compound, each of which is used in other bimesogenic compounds or a liquid crystal display device, while maintaining desired physical properties. A compound is represented by formula (1), a liquid crystal composition contains the compound, conjugate fibers with an encapsulated liquid crystal obtained from the liquid crystal composition, and a liquid crystal display device is obtained from the conjugate fibers with the encapsulated liquid crystal.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: February 25, 2020
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Michiko Sawada, Yasuyuki Sasada
  • Publication number: 20190359888
    Abstract: Liquid crystal compound satisfying at least one of physical properties such as high stability to heat or light, high maximum temperature, high clearing point, low minimum temperature of liquid crystal phase, small viscosity, suitable optical-anisotropy, large negative dielectric-anisotropy, suitable elastic constant and good compatibility with other liquid crystal compounds; liquid crystal composition containing the compound; and liquid crystal display device including the composition. Compound represented by formula (1), wherein R1 is alkyl having 1 to 15 carbons; R2 is alkyl having branched-chain and 3 to 15 carbons; A1, A2 are independently 1,2-cyclopropylene; Z1, Z2 are independently single bond or alkylene having 1 to 15 carbons; L1, L2 are fluorine, chlorine, —OCF3 or —OCH2F; X1, X2 are oxygen or sulfur; and a is 0 or 1, b is 0 or 1, and sum of a and b is 0, 1 or 2.
    Type: Application
    Filed: May 22, 2019
    Publication date: November 28, 2019
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Yasuyuki GOTOH, Kazuo OKUMURA, Akihiro TAKATA, Takahiro KOBAYASHI, Michiko SAWADA
  • Publication number: 20190194542
    Abstract: To provide a compound having an effect of preventing photodegradation of a liquid crystal composition and high solubility in a liquid crystal composition, a liquid crystal composition containing the compound, and a liquid crystal display element containing the composition. There are provided a compound represented by M(Z-Q)m, a liquid crystal composition containing the compound, and a liquid crystal display element using the composition. Here, m is 3, 4, or 5; M is a trivalent, tetravalent, or pentavalent cyclic group, an organic group, or a group constituted by trivalent nitrogen; Z is a single bond, —O—, —COO—, or —OCO—; and Q is a monovalent group represented by Formula (Q-1): in Formula (Q-1), Ra is a hydrogen atom, —O—, —OII, an alkyl group, or an alkenyl group, a terminal group (—CH3) is optionally substituted with —NIIR2 or —NR3R4, and here R3 and R4 are an alkyl group.
    Type: Application
    Filed: December 25, 2018
    Publication date: June 27, 2019
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Kazuo OKUMURA, Michiko SAWADA
  • Patent number: 10208249
    Abstract: Provided are a liquid crystal compound satisfying at least one of physical properties such as high stability to heat or light, high maximum temperature of a liquid-crystal phase, low minimum temperature thereof, small viscosity, suitable optical anisotropy, large dielectric anisotropy and good compatibility with other liquid-crystal compounds, a liquid crystal composition containing the compound and a liquid crystal display device including the composition. A compound is represented by formula (1), a liquid crystal composition contains the compound and a liquid crystal display device includes the composition. In formula (1), Ra and Rb are fluorine or alkyl; A0, A1 and A2 are 1,4-phenylene; Z1 and Z2 are a single bond or alkylene; one of Y1 and Y2 is fluorine, and the other is hydrogen; Rc is alkyl; and a and b are independently 0, 1, 2 or 3, and a sum of a and b is 0, 1, 2 or 3.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: February 19, 2019
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Yasuyuki Sasada, Michiko Sawada
  • Publication number: 20180086979
    Abstract: Provided are a liquid crystal compound satisfying at least one of physical properties such as high stability to heat or light, high maximum temperature of a liquid-crystal phase, low minimum temperature thereof, small viscosity, suitable optical anisotropy, large dielectric anisotropy and good compatibility with other liquid-crystal compounds, a liquid crystal composition containing the compound and a liquid crystal display device including the composition. A compound is represented by formula (1), a liquid crystal composition contains the compound and a liquid crystal display device includes the composition. In formula (1), Ra and Rb are fluorine or alkyl; A0, A1 and A2 are 1,4-phenylene; Z1 and Z2 are a single bond or alkylene; one of Y1 and Y2 is fluorine, and the other is hydrogen; Rc is alkyl; and a and b are independently 0, 1, 2 or 3, and a sum of a and b is 0, 1, 2 or 3.
    Type: Application
    Filed: September 19, 2017
    Publication date: March 29, 2018
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Yasuyuki SASADA, Michiko SAWADA
  • Patent number: 9909064
    Abstract: A compound, represented by formula (1): wherein, R1 and R2 are alkyl having 1 to 15 carbons or the like; ring A1 is tetrahydropyran-2,5-diyl, and ring A2 and ring A3 are 2-fluoro-1,4-phenylene or 2-chloro-1,4-phenylene; Z1, Z2 and Z3 are a single bond or the like; and a and b are 0 or 1, and a sum of a and b is 1.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: March 6, 2018
    Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Yasuyuki Gotoh, Mayumi Goto, Michiko Sawada
  • Publication number: 20180051210
    Abstract: Shown is a bimesogenic compound having high solubility in a liquid crystal compound, a liquid crystal composition, a chiral dopant, an additive including an antioxidant or an ultraviolet light absorber, and a polymerizable liquid crystal compound, each of which is used in other bimesogenic compounds or a liquid crystal display device, while maintaining desired physical properties. A compound is represented by formula (1), a liquid crystal composition contains the compound, conjugate fibers with an encapsulated liquid crystal obtained from the liquid crystal composition, and a liquid crystal display device is obtained from the conjugate fibers with the encapsulated liquid crystal.
    Type: Application
    Filed: March 2, 2016
    Publication date: February 22, 2018
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Michiko SAWADA, Yasuyuki SASADA
  • Publication number: 20170101582
    Abstract: A compound, represented by formula (1): wherein, R1 and R2 are alkyl having 1 to 15 carbons or the like; ring A1 is tetrahydropyran-2,5-diyl, and ring A2 and ring A3 are 2-fluoro-1,4-phenylene or 2-chloro-1,4-phenylene; Z1, Z2 and Z3 are a single bond or the like; and a and b are 0 or 1, and a sum of a and b is 1.
    Type: Application
    Filed: October 5, 2016
    Publication date: April 13, 2017
    Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATION
    Inventors: Yasuyuki GOTOH, Mayumi GOTO, Michiko SAWADA
  • Patent number: 6958227
    Abstract: The present invention relates to a method of producing cellulose comprising the steps of: (i) culturing filamentous fungus having the ability to produce cellulose; and (ii) recovering cellulose from a culture obtained by the step (i) and cellulose produced by filamentous fungi. The present invention provides technology to produce cellulose from filamentous fungi. Further, the present invention provides novel cellulose, which is produced by filamentous fungi and can be utilized as various industrial materials, additives, and the like.
    Type: Grant
    Filed: February 14, 2003
    Date of Patent: October 25, 2005
    Assignee: Incorporated Administrative Agency National Agriculture and Bio-Oriented Research Organization
    Inventors: Naoki Morita, Tamotsu Hoshino, Michiko Sawada, Hidetoshi Okuyama, Midori Kuriki, Akira Kawakami, Fumihiro Terami
  • Publication number: 20050019876
    Abstract: The present invention relates to a method of producing cellulose comprising the steps of: (i) culturing filamentous fungus having the ability to produce cellulose; and (ii) recovering cellulose from a culture obtained by the step (i) and cellulose produced by filamentous fungi. The present invention provides technology to produce cellulose from filamentous fungi. Further, the present invention provides novel cellulose, which is produced by filamentous fungi and can be utilized as various industrial materials, additives, and the like.
    Type: Application
    Filed: June 3, 2004
    Publication date: January 27, 2005
    Inventors: Naoki Morita, Tamotsu Hoshino, Michiko Sawada, Hidetoshi Okuyama, Midori Kuriki, Akira Kawakami, Fumihiro Terami
  • Publication number: 20030170830
    Abstract: The present invention relates to a method of producing cellulose comprising the steps of:
    Type: Application
    Filed: February 14, 2003
    Publication date: September 11, 2003
    Applicant: Secretary of Agency of Industrial Science
    Inventors: Naoki Morita, Tamotsu Hoshino, Michiko Sawada, Hidetoshi Okuyama, Midori Kuriki, Akira Kawakami, Fumihiro Terami