Patents by Inventor Ching-Shian Lin

Ching-Shian Lin 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).

  • Catalyst composition for production of polybutylene terephthalate via direct esterification process
    Patent number: 5900474
    Abstract: The invention relates to a process of producing polybutylene terephthalate by direct esterification and then melt polycondensation, characterized in that a specific catalyst composition is used, said catalyst composition comprising an organotitanium compound as primary catalyst in an amount of 0.01 to 1.0% by weight of terephthalic acid; and an alkaline metal salt of borate, pyroborate or metaborate as secondary catalyst in an amount of 0.001 to 1.0% by weight of terephthalic acid. By using said catalyt composition, amount of THF by-product generated can be reduced more than 30%, and the reaction rate of esterification can be increased over 20%.(FIG.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: May 4, 1999
    Assignee: National Science Council of Republic of China
    Inventors: Chun-Shan Wang, Ching-Shian Lin