Patents by Inventor Fred Cartwright

Fred Cartwright 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).

  • Method and apparatus for producing insulating material
    Patent number: 4185923
    Abstract: A method and apparatus for providing an insulating material, for example for a building, in which a premix of water and cement is provided, an air foam is formed by introducing air under pressure into a mixture and a foaming agent, and this air foam is introduced into the premix which is then stirred together with the foam, and the resulting mixture is pumped to the site to be insulated.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: January 29, 1980
    Inventors: David W. Bouette, Donald E. Baker, Fred Cartwright