Patents by Inventor Richard D. Stehly

Richard D. Stehly 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).

  • Processed silica as a natural pozzolan for use as a cementitious component in concrete and concrete products
    Patent number: 5554352
    Abstract: A pozzolan for use in concrete products which is a silica by-product in the acid treatment of silica-containing ore is described. The pozzolan contains over 75% by weight amorphous silica and provides an increase in the early strength of concrete in comparison to traditional pozzolans as well as minimizing alkali-silica reactions due to the presence of less impurities.
    Type: Grant
    Filed: May 9, 1995
    Date of Patent: September 10, 1996
    Assignee: Construction Material Resources
    Inventors: Stephen B. Jaques, Richard D. Stehly, Peter B. Dunning