Patents by Inventor Thomas Arwel Roberts

Thomas Arwel Roberts 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).

  • Fluoride ion sustained release preformed glass ionomer filler and dental compositions containing the same
    Patent number: 5883153
    Abstract: There is provided a fluoride-ion sustained release pre-formed glass ionomer filler comprising a powdery reaction product of polyalkenoic acid with a fluorine-containing glass, and a method of producing the same. There is also provided a dental composition containing the filler. The fluoride-ion sustained release pre-formed glass ionomer filler is long capable of releasing fluoride ions in the presence of water without involving disintegration. The dental composition of the invention is useful particularly for prevention of dental caries and like trouble.
    Type: Grant
    Filed: July 15, 1997
    Date of Patent: March 16, 1999
    Assignee: Shofu Inc.
    Inventors: Thomas Arwel Roberts, Kozo Miyai, Kunio Ikemura, Kiyomi Fuchigami, Toshio Kitamura