Patents by Inventor Mark Prieksat

Mark Prieksat 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).

  • Automated ponded infiltrometer
    Patent number: 5157959
    Abstract: A ponded infiltrometer including a bubble chamber formed in a base that supports a liquid reservoir. A single valve interposed in a channel between the bubble chamber and the reservoir controls both air flow into the device and water flow out of the device. A selectively movable bubble tube communicates between the bubble chamber and the atmosphere, and the position of the lower end of the bubble tube precisely regulates the amount of ponded water in the containment ring which contacts a section of soil. The base and attached reservoir are supported and secured above the containment ring by an adjustable tripod.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: October 27, 1992
    Assignees: Iowa State University Research Foundation, Inc., The United States of America as represented by the United States Department of Agriculture
    Inventors: Mark D. Ankeny, Tom Kaspar, Mark Prieksat