Patents by Inventor Stewart C. Spinney

Stewart C. Spinney 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).

  • Cellular concrete
    Patent number: 5183505
    Abstract: A more economical, stable, non-shrinking cellular concrete is provided by the addition of cementitious or non-cementitious fines to a cellular concrete mix. The improved cellular concrete is attained by reducing the amount of cement and replacing it with an equal amount of cementitious or non-cementitious fines. The partial replacement of the more expensive cement for the less expensive fines results in a more economical choice of cellular concrete suitable for use in structural applications, for insulation purposes, and for use in producing lightweight aggregate.
    Type: Grant
    Filed: May 27, 1992
    Date of Patent: February 2, 1993
    Assignee: Concrete Technology, Inc.
    Inventor: Stewart C. Spinney