Patents by Inventor Kuei-Chih Wang

Kuei-Chih Wang 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).

  • Method for preparing ester end-capped polyalkylene ether
    Patent number: 5344964
    Abstract: A method for preparing ester end-capped polyalkylene ether is disclosed. Cyclic ether monomers are subjected to ring-opening polymerization at a temperature of 10.degree.-80.degree. C. and a pressure of 0-10 atm in the presence of a solid acid of a mixed oxide of group III and group IV elements serving as catalyst and a mixture of acid and acid anhydride serving as molecular weight moidifier. The group III and group IV elements used should have a Ho index of +3.0 to -10.0.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: September 6, 1994
    Assignee: Industrial Technology Research Institute
    Inventors: Shiao-Jung Chu, Fu-Chen Liu, Ching-Tang Lin, Wen-Fa Lin, Kuei-Chih Wang, Sheng-Te Yang