Patents by Inventor Lygia Stewart

Lygia Stewart 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).

  • Pit and fissure sealant for teeth
    Patent number: 4224072
    Abstract: An inorganic, enamel-like sintered coating (or sealant) adherent to teeth is disclosed. Materials very similar to tooth enamel, e.g., hydroxyapatite, combined with a low melting eutectic constitute the coating. This material can be applied to the tooth and sintered in place with a laser. The presence of the low melting eutectic lowers the energy requirement for sintering.
    Type: Grant
    Filed: September 11, 1978
    Date of Patent: September 23, 1980
    Assignee: University of Utah
    Inventor: Lygia Stewart