Patents by Inventor Frank Dewey

Frank Dewey 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).

  • Rigid composite articles
    Patent number: 4154888
    Abstract: Rigid composite articles comprising a relatively thin, impression-retaining surface formed of a hard, rigid, room-temperature cured urethane resin and a relatively thick backing and reinforcing are made by casting a thin layer of urethane resin on the surface of a master, curing the urethane, then casting thereon a relatively thick backing layer of a casting material such as plaster or resin.
    Type: Grant
    Filed: December 7, 1977
    Date of Patent: May 15, 1979
    Inventor: Frank Dewey
  • Polyurethane-epoxy casting resin
    Patent number: 4143009
    Abstract: A two-part liquid resin system consisting of a first part comprising an epoxy compound and a hydroxyalkyl tertiary amine, and a second part comprising a liquid isocyanate resin, when mixed, form liquid compositions which cure rapidly at or near room temperature to provide polyurethane-epoxy resins useful in the production of castings, laminates and coatings.
    Type: Grant
    Filed: March 2, 1977
    Date of Patent: March 6, 1979
    Inventor: Frank Dewey
  • Rigid composite articles and a method for their manufacture
    Patent number: 4086118
    Abstract: Rigid composite articles comprising a relatively thin, impression-retaining surface formed of a hard, rigid, room-temperature cured urethane resin and a relatively thick backing and reinforcing are made by casting a thin layer of urethane resin on the surface of a master, curing the urethane, then casting thereon a relatively thick backing layer of a casting material such as plaster or resin.
    Type: Grant
    Filed: October 4, 1976
    Date of Patent: April 25, 1978
    Inventor: Frank Dewey