Patents by Inventor Qizhu Ding

Qizhu Ding 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).

  • Dihydropyrimidine derivatives as cysteine protease inhibitors
    Publication number: 20040024000
    Abstract: Ditiydropyrimidine derivatives are disclosed, which can be used to inhibit cysteine protease activity.
    Type: Application
    Filed: April 11, 2003
    Publication date: February 5, 2004
    Inventors: Rajeshwar Singh, Andhe V.N. Reddy, Nian E. Zhou, Qizhu Ding, George Thomas, Jadwiga Kaleta, Ronald G. Micetich
  • Cysteine protease inhibitors
    Patent number: 6635621
    Abstract: This invention relates to derivatives of alpha-amino acid amides, to pharmaceutical compositions containing such compounds, and to their use in medicine as inhibitors of cysteine proteases, particularly the cathepsins. A compound of formula (I) is described or a pharmaceutically acceptable salt, hydrate or solvate thereof. Pharmaceutically acceptable salts of the compounds of this invention include the sodium, potassium, magnesium, calcium, hydrogen chloride, tartaric acid, succinic acid, fumaric acid and p-toluenesulfonic acid salts.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: October 21, 2003
    Assignee: Naeja Pharmaceutical Inc.
    Inventors: Rajeshwar Singh, Nian Zhou, Andhe V. N. Reddy, George Thomas, Qizhu Ding, Jadwiga Kaleta, Ronald George Micetich, Mark Whittaker
  • Method of microwave bond cleavage of a hydrocarbon compound in a liquid phase
    Patent number: 6106675
    Abstract: The method of the present invention is a microwave bond cleavage of a first hydrocarbon compound, the first hydrocarbon compound in a liquid phase and substantially non-aqueous, to a second compound having a shorter carbon chain than the first hydrocarbon compound. The method has the steps of exposing a combination of the first hydrocarbon compound with a supported catalyst having a carrier of a non-metallic amorphous solid with at least one catalytic metal dispersed therein to microwave energy thereby converting the first hydrocarbon compound into the second hydrocarbon compound, and recovering the second hydrocarbon compound. Advantages of the present invention include use of a low cost supported catalyst at ambient temperature and pressure.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: August 22, 2000
    Assignees: Battelle Memorial Institute, Governors of the University of Alberta
    Inventors: Dennis D. Tanner, Qizhu Ding, Pramod Kandanarachchi, James A. Franz
  • Catalytic microwave conversion of gaseous hydrocarbons
    Patent number: 5972175
    Abstract: The method of the present invention is for producing at least hydrogen from a gaseous hydrocarbon. The gaseous hydrocarbon is selected from the group consisting of methane, ethane, butane, propane and combinations thereof. The method proceeds by exposing the gaseous hydrocarbon with the supported catalyst to microwave radiation. The supported catalyst has a support of a lattice of a non-metallic amorphous solid and at least one catalytic metal having atoms interspersed throughout the lattice of the support. A preferred embodiment is a lattice of carbon with at least one catalytic metal interspersed throughout the lattice. Examples include char.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: October 26, 1999
    Assignee: Governors of the University of Alberta
    Inventors: Dennis D. Tanner, Qizhu Ding