Patents by Inventor Frank H. Freeman

Frank H. Freeman 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).

  • System for making direct oral impression tray
    Patent number: 4375966
    Abstract: A system and materials for making oral impression trays in situ is disclosed, including a transporter member, tray member, and spacer member. Materials are disclosed for use as mold materials for polymerization in situ against or in close proximity to living tissue without high exothermal polymerization and its attendant discomfort and damage and with reduced polymerization shrinkage to produce a more accurate and stable custom tray.
    Type: Grant
    Filed: August 24, 1981
    Date of Patent: March 8, 1983
    Assignee: Sybron Corporation
    Inventor: Frank H. Freeman
  • Barium aluminum silicate filler for U.V. curable composites
    Patent number: 4252526
    Abstract: A single paste photopolymerizable dental restoration composition which utilizes a barium-aluminum-silicate glass filler material.
    Type: Grant
    Filed: May 24, 1979
    Date of Patent: February 24, 1981
    Assignee: Sybron Corporation
    Inventors: Narayanan Madhavan, Frank H. Freeman
  • Barium aluminum silicate filler for U.V. curable composites
    Patent number: 4192795
    Abstract: A single paste photopolymerizable dental restoration composition which utilizes a barium-aluminum-silicate glass filler material.
    Type: Grant
    Filed: September 29, 1977
    Date of Patent: March 11, 1980
    Assignee: Sybron Corporation
    Inventors: Narayanan Madhavan, Frank H. Freeman