Patents by Inventor Howard E. Colburn

Howard E. Colburn 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).

  • Cement compositions for temporary structures
    Patent number: 5378278
    Abstract: A cement composition for temporary, environmentally sound structures, including berms for erosion and flood control, comprising portland cement, flyash, sodium silicate, water and aggregate in predetermined amounts to obtain a pumpable cement composition having less than 2 inches of slump and a 28 day compressive strength of between about 100 and about 400 psi.
    Type: Grant
    Filed: July 23, 1993
    Date of Patent: January 3, 1995
    Inventor: Howard E. Colburn