Patents by Inventor Richard D. Pratt

Richard D. Pratt 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).

  • Crossover mold tool for consolidating composite material
    Patent number: 5145621
    Abstract: A curved composite material body is consolidated to a complexly curved shape by placing rigid tooling on the concave-facing side of the body, and a pressure membrane on the other (convex-facing) side of the body. In another region of the body where the sign of the curvature of the body changes so that the other side becomes the concave-facing side, the rigid tooling is placed on that side, against the concave-facing side, and the pressure membrane is contacted to the convex-facing side. The rigid tooling thus crosses over from one side to the other through various regions of the body, providing a precise consolidation to meet the structural and dimensional specifications. Consolidation is achieved by applying pressure to the body of composite material through the pressure membranes.
    Type: Grant
    Filed: April 20, 1990
    Date of Patent: September 8, 1992
    Assignee: General Electric Company
    Inventor: Richard D. Pratt
  • Intumescent fire retardant material
    Patent number: 4065394
    Abstract: A silicone resin base fire retardant system having a temperature capability at least to about 450.degree. F (230.degree. C) combines intumescent characteristics with a crusting and charring capability through use of a combination of an oxide of iron and a phosphate of potassium for crusting, along with a charring material such as tripentaerythritol and a blowing agent, such as melamine, in a silicone resin base to allow for adequate expansion.
    Type: Grant
    Filed: May 17, 1976
    Date of Patent: December 27, 1977
    Assignee: General Electric Company
    Inventors: Richard D. Pratt, Paul F. Proffitt, George Webb
  • Intumescent fire retardant material and article
    Patent number: 4052526
    Abstract: A silicone resin base fire retardant system having a temperature capability at least to about 450.degree. F (230.degree. C) combines intumescent characteristics with a crusting and charring capability through use of a combination of an oxide of iron and a phosphate of potassium for crusting, along with a charring material such as tripentaerythritol and a blowing agent, such as melamine, in a silicone resin base to allow for adequate expansion.
    Type: Grant
    Filed: May 17, 1976
    Date of Patent: October 4, 1977
    Assignee: General Electric Company
    Inventors: Richard D. Pratt, Paul F. Proffitt, George Webb
  • Intumescent fire retardant material and article
    Patent number: 3983082
    Abstract: A silicone resin base fire retardant system having a temperature capability at least to about 450.degree.F (230.degree.C) combines intumescent characteristics with a crusting and charring capability through use of a combination of an oxide of iron and a phosphate of potassium for crusting, along with a charring material such as tripentaerythritol and a blowing agent, such as melamine, in a silicone resin base to allow for adequate expansion.
    Type: Grant
    Filed: February 19, 1975
    Date of Patent: September 28, 1976
    Assignee: General Electric Company
    Inventors: Richard D. Pratt, Paul F. Proffitt, George Webb