Patents by Inventor Robert Frederick Barber

Robert Frederick Barber 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).

  • Lightweight composite material comprising hollow ceramic microspheres
    Patent number: 5935699
    Abstract: The present invention relates to a lightweight composite material comprising:(a) hollow ceramic microspheres;(b) cement;(c) concrete admixture or additive; and(d) water.The invention also relates to a process for preparing the lightweight composite material and construction products, concrete furniture or art objects wholly or partly composed of the lightweight composite material.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: August 10, 1999
    Inventor: Robert Frederick Barber