Patents by Inventor Cheng-Chao Pai

Cheng-Chao Pai 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).

  • Publication number: 20100274040
    Abstract: The present invention relates to 1,1?-bi-2-naphthol derivatives having (meth)acrylate groups, which can be used for preparing photocurable coating and has a refractive index of 1.53 or more. By using the present 1,1?-bi-2-naphthol derivatives, optical components with high refractive index and less light dispersion can be produced.
    Type: Application
    Filed: July 8, 2009
    Publication date: October 28, 2010
    Inventors: Cheng Chao PAI, Hsiu Chi Lai, Ching Ying Wu, Kun Lin Lee
  • Patent number: 6680385
    Abstract: A method for the preparation of aryl methyl ketones converts a variety of ethyl arenas to the corresponding aryl methyl ketones using a dioxygen-containing gas as the oxidant. The catalyst used for the reaction is a metal complex bearing general formulas as disclosed.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: January 20, 2004
    Assignees: The Hong Kong Polytechnic University, Sichuan University
    Inventors: Albert Sun-Chi Chan, Jian-Ying Qi, Cheng-Chao Pai, Xian-Jun Li, Li-Sheng Deng, Wen-Zao Li, Bin Sun, Jia-Yuan Hu
  • Publication number: 20030144554
    Abstract: A method for the preparation of aryl methyl ketones converts a variety of ethyl arenas to the corresponding aryl methyl ketones using a dioxygen-containing gas as the oxidant. The catalyst used for the reaction is a metal complex bearing general formulas as disclosed.
    Type: Application
    Filed: January 25, 2002
    Publication date: July 31, 2003
    Applicant: The Hong Kong Polytechnic University
    Inventors: Albert Sun-Chi Chan, Jian-Ying Qi, Cheng-Chao Pai, Xian-Jun Li, Li-Sheng Deng, Wen-Zao Li, Bin Sun, Jia-Yuan Hu
  • Patent number: 5886182
    Abstract: Novel, optically active phosphorous compounds of the formula, ##STR1## wherein R.sup.1 represents hydrogen atoms, straight or branched-chain alkyl groups having from 1 to 6 carbon atoms, R.sup.2 represents hydrogen atoms, halogen atoms, lower alkyl groups (1 to 6 carbon atoms), lower alkoxy groups (1 to 6 carbon atoms), hydroxy group, chiral hydroxyalkyl groups, and amino groups (1.degree., 2.degree., 3.degree.) vinyl groups or allyl groups and R.sup.3 represents phenyl groups, aryl groups, cyclohexyl groups, substituted and unsubstituted cycloalkyl groups, heteroaromatic rings, are described. The compounds of the formula serve as highly useful ligands in the preparation of ruthenium complexes which are effective catalysts for the asymmetric hydrogenation of 2-arylpropenoic acids leading to high valued 2-arylpropionic acids.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: March 23, 1999
    Assignee: The Hong Kong Polytechnic University
    Inventors: Albert Sun-Chi Chan, Cheng-Chao Pai