Patents by Inventor Fengshi Ma

Fengshi Ma 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).

  • 4-((3, 5, 6-trimethylpyrazine-2-yl) methoxyl) benzoic acid and its derivatives
    Patent number: 8350033
    Abstract: Ligustrazine aromatic acid ether derivative of general formula I, its preparation method, pharmaceutical composition and application, wherein Ar is selected from aryl substituted aryl and substituted styryl, R is selected from hydrogen and alkyl with no more than 6 carbon atoms.
    Type: Grant
    Filed: October 27, 2008
    Date of Patent: January 8, 2013
    Inventors: Jiaming Li, Guangwei He, Yonghai Zhao, Fengshi Ma, Yong He, Qiang Wu, Feng Li
  • Ligustrazine aromatic acid ether derivative, its preparation method, pharmaceutical composition, and application
    Publication number: 20100228029
    Abstract: Ligustrazine aromatic acid ether derivative of general formula I, its preparation method, pharmaceutical composition and application, wherein Ar is selected from aryl substituted aryl and substituted styryl, R is selected from hydrogen and alkyl with no more than 6 carbon atoms.
    Type: Application
    Filed: October 27, 2008
    Publication date: September 9, 2010
    Inventors: Jiaming Li, Guangwei He, Yonghai Zhao, Fengshi Ma, Yong He, Qiang Wu, Feng Li