Patents by Inventor John P. Frush

John P. Frush 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).

  • Patent number: 5244388
    Abstract: Dental impression material is applied to the surfaces of teeth under pressure and in a direction of flow perpendicular to the underlying tooth surface. The impression material is pushed into the sulci, interstices of teeth and crevices in adjacent tissues which presses air out and prevents formation of voids. The applicator can be an accessory which is frictionally and sealingly received over the tip of a syringe. The distal end of the applicator may contain a vertical flap spaced from the outlet orifice and adjacent side walls, forming a chamber. As the impression material is extruded, it collects in the chamber under pressure. The end wall may be hinged to wipe the material onto surfaces and may be cut into mini-flaps to conform to cusps and adjacent depressions on occlusal surfaces of teeth.
    Type: Grant
    Filed: November 15, 1991
    Date of Patent: September 14, 1993
    Inventor: John P. Frush
  • Patent number: D372088
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: July 23, 1996
    Assignee: Accu-Dent Research & Development Co., Inc.
    Inventor: John P. Frush
  • Patent number: D372096
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: July 23, 1996
    Assignee: Accu-Dent Research & Development Co., Inc.
    Inventor: John P. Frush