Patents by Inventor Yih-Wen Gung

Yih-Wen Gung 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).

  • Dentin adhesive containing 2-hydroxyethyl methacrylate and esterification product of polyvinyl alcohol and acryloyl chloride
    Patent number: 5373034
    Abstract: A primer composition has been discovered which improves bonding of dentin and filler resin. The primer composition disclosed in the present invention contains, in weight ratio of 20:1 to 5:1, of 2-hydroxyethyl methacrylate and the esterification product of polyvinyl alcohol and acryloyl chloride. The weight average molecular weight of polyvinyl alcohol ranges from 60,000 to 85,000 with residual acetyl content is less than 10%. The esterification of OH group in polyvinyl alcohol ranges from 5 to 40 mole percent. The present invention does not contain glutaraldehyde, but provides greater bonding strength.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: December 13, 1994
    Assignee: National Science Council
    Inventors: Yng J. Wang, Yih-Wen Gung, Kuo H. Hsia