Patents by Inventor ChangQiu Zhao

ChangQiu Zhao 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).

  • Alkenylphosphonic ester and preparation process thereof
    Patent number: 6949667
    Abstract: Novel alkenylphosphonic acid esters of the following general formula (I): R1CH?CR2[P(O)(OCR3R4CR5R6O)]??(I) and a simple process for the preparation thereof are provided by the use of secondary cyclic phosphonic acid esters as the starting material.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: September 27, 2005
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Li-Biao Han, ChangQiu Zhao, Masato Tanaka
  • Alkenylphosphonic ester and preparation process thereof
    Publication number: 20030166612
    Abstract: Novel alkenylphosphonic acid esters of the following general formula (I):
    Type: Application
    Filed: December 4, 2002
    Publication date: September 4, 2003
    Inventors: Li-Biao Han, ChangQiu Zhao, Masato Tanaka