Patents by Inventor Chun-Tzu Yang

Chun-Tzu Yang 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).

  • Aryl sulfonium salt, polymerizable composition and polymerization method of the same
    Publication number: 20050148679
    Abstract: An aryl sulfonium salt, whose photo-induced products are non-benzene, is represented by the formula (I): wherein Z represents a hydrogen atom or the formula (II): The substituted groups of R1 to R12 are independently a hydrogen atom, a C1 to C12 alkyl group or a C3 to C12 cyclic alkyl group, and each phenyl group independently has at least one of the alkyl group or the cyclic alkyl group; and X? and Y? are independently an anion. A polymerizable composition containing the aryl sulfonium salt and a polymerization method of the same are provided.
    Type: Application
    Filed: December 29, 2003
    Publication date: July 7, 2005
    Inventors: Chingfan Chiu, Chun Tzu Yang
  • Chiral ligand and method for preparing cyanohydrins from aldehydes
    Patent number: 6258966
    Abstract: A chiral ligand of the formula (II) or formula (II′), was synthesized. The chiral ligand (II) or formula (II′) can chelate to metals to form a catalytic complex to catalyze the addition of trimethylsilyl cyanide to aldehydes to give optically active cyanohydrin, individually.
    Type: Grant
    Filed: October 13, 1999
    Date of Patent: July 10, 2001
    Assignee: Everlight USA, Inc.
    Inventors: Biing-Jiun Uang, Chun-Tzu Yang