Patents by Inventor YoungJun Na

YoungJun Na 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).

  • 3-methyl-chroman and -thiochroman derivatives
    Patent number: 6552069
    Abstract: The present invention provides a compound having the following general formula (1): in which R1 represents a hydrogen atom, etc.; R2 represents a C3-C3 perhalogenoalkyl group, etc.; each of R3 and R4 independently represents a hydrogen atom, etc.; X represents an oxygen atom or a sulfur atom; m represents an integer of 2 to 14; and n represents an integer of 0 to 8; or enantiomers of the compound, or hydrates or pharmaceutically acceptable salts of the compound or its enantiomers. The compound of general formula (1) is advantageous in pharmaceutical use because of its anti-estrogenic activity.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: April 22, 2003
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: JaeChon Jo, YoungJun Na, HongIl Heo, JongMin Kim, Kazumi Morikawa, Yoshitake Kanbe, Masahiro Nishimoto, MyungHwa Kim