Patents by Inventor Youngjae Chun

Youngjae Chun 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: 5210267
    Abstract: The present invention provides novel optically-active aliphatic .beta.-halogen substituted carboxylic acid 4'-(4-alkoxybenzyloxy)biphenyl thioester compounds of the general formula: ##STR1## wherein R represents a straight-chained alkyl radical having C.sub.2 to C.sub.10 carbon atoms and X represents a halogen atom, and a process for the preparation thereof. The novel biphenyl thioester compounds provided according to the present invention are usable as a dopant or a base material for liquid crystal blending, thereby improving the properties of LCD.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: May 11, 1993
    Assignee: Samsung Electron Devices Co., Ltd.
    Inventors: Youngjae Chun, Junha Suh
  • Patent number: 5166391
    Abstract: The present invention provides novel optically-active aliphatic .alpha.-halogen substituted carboxylic acid 4'-(4-alkoxybenzyloxy)biphenyl thioester compounds of the general formula: ##STR1## wherein R represents a n-alkyl radical having C.sub.8 to C.sub.15, carbon atoms, C* represents an asymmetric carbon atom, X represents a halogen atom and R' represents ##STR2## and process for the preparation thereof. The novel biphenyl thioester compounds provided according to the present invention are usable as a dopant or a base material for liquid crystal blending, thereby improving the properties of LCD.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: November 24, 1992
    Assignee: Samsung Electron Devices Co., Ltd.
    Inventors: Youngjae Chun, Junha Suh