Patents by Inventor Junho Chu

Junho Chu 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).

  • Cholanic acid ring based 4-(trifluoroacetyl)phenyl derivatives, process for preparation and use thereof
    Patent number: 6177417
    Abstract: The present invention relates to a cholanic acid ring based 4-(trifluoroacetyl)phenyl derivatives of the following formula 1, process for preparation and use thereof. The cholanic acid ring based 4-(trifluoroacetyl)phenyl derivatives of the present invention may be used as a host material in the host-guest chemistry, in detail as a material for ion sensors, optical sensors, gas sensors, biosensors, chromatographies, photostimulated ion-binding resins, ion exchange resins and organic reactions. (In the above formula 1, R, R1, R2, R3 and n are defined in the specifications).
    Type: Grant
    Filed: June 22, 1999
    Date of Patent: January 23, 2001
    Inventors: Junho Chu, Hyung Jung Pyun, In Jun Yoon, Jae Ho Shin, Hakhyun Nam, Geun Sig Cha