Patents by Inventor Yuki Motoyama

Yuki Motoyama 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: 5716544
    Abstract: A phenyl ester compound of the following general formula (1), ##STR1## wherein m is an integer of 3 to 8, n is an integer of 3 to 11, both of X.sup.1 and X.sup.2 are hydrogen atoms, or one of X.sup.1 and X.sup.2 is a fluorine atom and the other is a hydrogen atom, and A is a hydrogen atom or --CH.sub.3 ; and an anti-ferroelectric liquid crystal composition containing the above phenyl ester compound and a specific anti-ferroelectric liquid crystal compound or a specific liquid crystal compound having ferrielectric-phase.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: February 10, 1998
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Yuki Motoyama, Tomoyuki Yui, Masahiro Johno, Takahiro Matsumoto, Teruyo Tomiyama
  • Patent number: 5660762
    Abstract: A two-rings-containing phenyl ester compound of the following general formula (1), ##STR1## wherein R.sup.1 is a linear alkyl group having 5 to 12 carbon atoms, R.sup.2 is a linear alkyl group having 1 to 15 carbon atoms, X.sup.1 and X.sup.2 are both hydrogen atoms or one of X.sup.1 and X.sup.2 is a fluorine atom and the other is a hydrogen atom, Y.sup.1 and Y.sup.2 are both hydrogen atoms or one of Y.sup.1 and Y.sup.2 is a fluorine atom and the other is a hydrogen atom, and A.sup.1 is a hydrogen atom, --CH.sub.3 or --CF.sub.3, provided that when A.sup.1 is a hydrogen atom or --CH.sub.3, p is 0 and that when A.sup.1 is --CF.sub.3, p is t and q is an integer of 5 to 8, and an anti-ferroelectric liquid crystal composition containing at least one of two-rings-containing phenyl ester compounds of the above general formula (1) in claim 1 and either an anti-ferroelectric liquid crystal compound or a mixture of anti-ferroelectric liquid crystal compounds.
    Type: Grant
    Filed: December 19, 1995
    Date of Patent: August 26, 1997
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Maki Ito, Tomoyuki Yui, Masahiro Johno, Teruyo Tomiyama, Hiroshi Mineta, Yuki Motoyama
  • Patent number: 5426244
    Abstract: Phenols are reacted with a hydrogen peroxide in the presence of a crystalline titanosilicate catalyst and a cyclic ether, such as dioxane, as a solvent. The method provides especially high para-selectivity compared with conventional methods, and, at the same time, provides high yields of dihydric phenols versus hydrogen peroxide.
    Type: Grant
    Filed: May 2, 1994
    Date of Patent: June 20, 1995
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Ryuji Sugai, Osamu Kondo, Yuki Motoyama, Shu Yoshida