Patents by Inventor Mark Burkhard

Mark Burkhard 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).

  • Means and method for measurement of porous materials
    Patent number: 5299140
    Abstract: An apparatus and method for determining physical and chemical properties of a porous medium such as soil or rock. A sample of porous medium is held within a container. Conditions regarding the sample are sensed, including but not limited to weight, temperature, pressure, and humidity. Conditions at the sample can be brought to equilibrium or varied according to instructions. A control system can adjust or equilibrate the conditions according to desire and according to which properties or relationships between physical and chemical properties are desired to be derived.
    Type: Grant
    Filed: June 23, 1992
    Date of Patent: March 29, 1994
    Assignee: Daniel B. Stephens & Associates, Inc.
    Inventors: Mark D. Ankeny, Mark Burkhard