Patents by Inventor Liu Ruiping

Liu Ruiping 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).

  • PHOSPHODIESTERASE 4 INHIBITORS
    Publication number: 20090176799
    Abstract: Selective PDE4 inhibition is achieved by 4-(substituted-phenyl)-2-pyrrolidinone compounds. The compounds exhibit improved PDE4 inhibition as compared to compounds like rolipram and show selectivity with regard to inhibition of other classes of PDEs. The compounds of the present invention are of formula I: wherein R1, R2, and R3 are as defined herein.
    Type: Application
    Filed: December 1, 2008
    Publication date: July 9, 2009
    Inventors: Liu Ruiping, Mike De Vivo, Hans-Jurgen Ernst Hess, Allen Hopper, Erik Kreuster, Ashok Tehim
  • Phosphodiesterase 4 inhibitors
    Publication number: 20050272803
    Abstract: Selective PDE4 inhibition is achieved by 4-(substituted-phenyl)-2-pyrrolidinone compounds. The compounds exhibit improved PDE4 inhibition as compared to compounds like rolipram and show selectivity with regard to inhibition of other classes of PDEs. The compounds of the present invention are of formula I: wherein R1, R2, and R3 are as defined herein.
    Type: Application
    Filed: July 22, 2005
    Publication date: December 8, 2005
    Inventors: Liu Ruiping, Mike De Vivo, Hans-Jurgen Ernst Hess, Allen Hopper, Erik Kreuster, Ashok Tehim