Patents by Inventor Hiroyuki Yumoto

Hiroyuki Yumoto 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).

  • L-tartrate of trans-(-)-4-(4-fluorophenyl)-3-hydroxymethylpiperidine compound and process for preparing the same
    Patent number: 6316628
    Abstract: An L-tartrate of a trans-(−)-4-(4-fluorophenyl)-3-hydroxymethylpiperidine compound, represented by the formula (I): wherein R1 is hydrogen atom, a substituted or unsubstituted, linear or branched alkyl group having 1 to 6 carbon atoms, or an aralkyl group having 7 to 12 carbon atoms. The L-tartrate of trans-(−)-4-(4-fluorophenyl)-3-hydroxymethylpiperidine compound can be suitably used as an intermediate for pharmaceuticals such as paroxetine which is useful, for example, as an antidepressant.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: November 13, 2001
    Assignee: Sumika Fine Chemicals Co., Ltd.
    Inventors: Shigeya Yamazaki, Taro Ishibashi, Yoshihiro Kawada, Hiroyuki Yumoto, Taichi Yoshikawa, Masami Igi