Patents by Inventor Donald R. Hanst

Donald R. Hanst 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).

  • Composition for soil surface stabilization
    Patent number: 5542977
    Abstract: A slurry composition for stabilizing the upper layers of the earth comprising a lime and a fly ash having a calcium oxide content of less than 18% and water.
    Type: Grant
    Filed: February 10, 1995
    Date of Patent: August 6, 1996
    Inventor: Donald R. Hanst
  • Method for soil surface stabilization
    Patent number: 5401312
    Abstract: Abstract A method for stabilizing the upper layers of the earth's surface is claimed that comprises the steps of: mixing an amount of lime with an amount of water, simultaneously or sequentially mixing an amount of fly ash with the lime/water mix to form a slurry, distributing said slurry onto the earth's surface and working said slurry into the upper layers of the earth's surface.
    Type: Grant
    Filed: October 22, 1993
    Date of Patent: March 28, 1995
    Inventor: Donald R. Hanst