Patents by Inventor Tokifumi Masukawa

Tokifumi Masukawa 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).

  • Tetrahydropyran compound, liquid crystal, composition and liquid crystal display device containing the liquid crystal composition
    Patent number: 7842357
    Abstract: A compound represented by the following formula (1): wherein R1 and R2 are, for example alkyl; T1, T2 and T3 are independently tetrahydropyran-2,5-diyl or tetrahydropyran-3,6-diyl; A1 and A2 are, for example 1,4-cyclohexylene; Z1, Z2, Z3 and Z4 are, for example, a single bond; i, j, k, m and n are, for example 0 or 1; and i+j+k+m+n is, for example 2 or 3.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: November 30, 2010
    Assignees: Chisso Corporation, Chisso Petrochemical Corporation
    Inventors: Tokifumi Masukawa, Atsuko Fujita
  • LIQUID CRYSTAL COMPOUND HAVING NEGATIVE DIELECTRIC ANISOTROPY, LIQUID CRYSTAL COMPOSITION, AND LIQUID CRYSTAL DISPLAY DEVICE
    Publication number: 20090324854
    Abstract: A liquid crystal compound is provided that has excellent characteristics, such as a negatively large dielectric anisotropy. A liquid crystal composition containing the compound, and a liquid crystal display device containing the composition are also provided. A compound having the three factors, i.e., (1) a tetrahydropyran ring, (2) terminal alkenyl chain and (3) exhibits excellent characteristics including a negatively large dielectric anisotropy (??). The use of the compound having the characteristics provides an excellent liquid crystal composition and an excellent liquid crystal display device.
    Type: Application
    Filed: June 10, 2009
    Publication date: December 31, 2009
    Applicants: CHISSO CORPORATION, CHISSO PETROCHEMICAL CORPORATION
    Inventor: TOKIFUMI MASUKAWA
  • LIQUID CRYSTAL COMPOUND HAVING NEGATIVE DIELECTRIC ANISOTROPY, LIQUID CRYSTAL COMPOSITION, AND LIQUID CRYSTAL DISPLAY DEVICE
    Publication number: 20090278088
    Abstract: A liquid crystal compound is provided that has excellent characteristics, such as a negatively large dielectric anisotropy. A liquid crystal composition containing the compound, and a liquid crystal display device containing the composition are also provided. A compound having the three factors, i.e., (1) a tetrahydropyran ring, (2) —CH2O— or —OCH2— and (3) exhibits excellent characteristics including a negatively large dielectric anisotropy. The use of the compound having the characteristics provides an excellent liquid crystal composition and an excellent liquid crystal display device.
    Type: Application
    Filed: May 4, 2009
    Publication date: November 12, 2009
    Applicants: CHISSO CORPORATION, CHISSO PETROCHEMICAL CORPORATION
    Inventor: TOKIFUMI MASUKAWA
  • Tetrahydrofuran compound, liquid crystal, composition and liquid crystal display device containing the liquid crystal composition
    Publication number: 20060071194
    Abstract: A compound represented by the following formula (1): wherein R1 and R2 are, for example alkyl; T1, T2 and T3 are independently tetrahydropyran-2,5-diyl or tetrahydropyran-3,6-diyl; A1 and A2 are, for example 1,4-cyclohexylene; Z1, Z2, Z3 and Z4 are, for example, a single bond; i, j, k, m and n are, for example 0 or 1; and i+j+k+m+n is, for example 2 or 3.
    Type: Application
    Filed: October 4, 2005
    Publication date: April 6, 2006
    Inventors: Tokifumi Masukawa, Atsuko Fujita