Patents by Inventor Feng-Wen Yeng

Feng-Wen Yeng 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).

  • Antiatherosclerosis agents for lipid-lowering and antiperoxidative activity
    Patent number: 5840991
    Abstract: The invention relates to novel compounds of formula (I) ##STR1## wherein R.sub.1 represents hydrogen, hydroxy or alkoxy;R.sub.2, R.sub.3, R.sub.4 and R.sub.5 may be hydrogen or alkyl; andn is 0,1 or 2;and the pharmaceutically acceptable salts thereof.The invention also relates to the processes for preparing the compounds of formula (I), and the pharmaceutical compositions containing them, and their use as a low density lipoprotein peroxidation inhibitors, anti-atherosclerotic agents and/or antihyperlipidemic agents.
    Type: Grant
    Filed: September 17, 1997
    Date of Patent: November 24, 1998
    Assignee: Development Center for Biotechnology
    Inventors: Feng-Wen Yeng, Shan-Shue Wang, Jaw-Yuh Chiu, Chin-Fen Lee, Chia-Lin J. Wang
  • Method for resolving racemic compounds
    Patent number: 5504221
    Abstract: A method for resolving racemic dimethyl-4,4'-dimethoxy-5,6,5',6'-di(methylenedioxy)biphenyl-2,2'-dicarbox ylate ("DDB"), in which a chiral .alpha.-alkyl benzyl alcohol is used as the resolving agent. More specifically, racemic DDB is first hydrolyzed to form dicarboxylic acid, which is then reacted with chiral .alpha.-alkyl benzyl alcohol to form two chiral isomers. The chiral isomers, after separation either by chromatography or by recrystalli-zation, are respectively hydrogenated and esterified to form chiral DDB isomers.
    Type: Grant
    Filed: March 2, 1995
    Date of Patent: April 2, 1996
    Assignee: Development Center for Biotechnology
    Inventors: Feng-Wen Yeng, Jaw-Yuh Chiu, Chia-Lin J. Wang
  • Photoconductor comprising bisazo and squarylium pigments as the charge generation material
    Patent number: 5270139
    Abstract: A new organophotoconductor comprising a conductive substrate, a charge generation layer and a charge transport layer wherein the charge generation layer comprises a bisazo compound and a squarylium compound as the charge generation material. The organophotoconductor exhibits high sensitivity, low residual potential and improved durability and reproducibility.
    Type: Grant
    Filed: July 2, 1992
    Date of Patent: December 14, 1993
    Assignee: Industrial Technology Research Institute
    Inventors: Feng-Wen Yeng, Jia-Ming Liu