Patents by Inventor Guoji Zhang

Guoji Zhang 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).

  • Process for producing creatine or creatine-monohydrate
    Patent number: 6326513
    Abstract: The present invention relates to a process for producing creatine or creatine-monohydrate, comprising the step of reacting N-methylglycine, sodium N-methylglycinate and/or potassium N-methylglycinate with S-methylisothiourea and/or S-methylisothiourea sulfate in water or in a mixture of water and an alcohol solvent under the temperature from 15° C. to 140° C. and a pH of 7-13. By using the process of the present invention creatine or creatine-monohydrate with a higher purity can be produced at a much lower cost.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: December 4, 2001
    Assignee: Tianjin Tiancheng Pharmaceutical Co., LTD
    Inventors: Lihua An, Yuwen Zheng, Guoji Zhang