Patents by Inventor Dianna Liu

Dianna Liu 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).

  • Preemergence weed control using dipeptides from corn gluten hydrolysate
    Patent number: 5290757
    Abstract: A composition useful as a selective preemergence herbicide is provided, comprising an effective amount of a dipeptide selected from the group consisting of Gln-Gln, Ala-Asn, Ala-Gln, Gly-Ala, Ala-Ala and mixtures thereof, in combination with a compatible carrier vehicle.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: March 1, 1994
    Assignees: Iowa State University Research Foundation, Inc., Grain Processing Corporation
    Inventors: Nick E. Christians, John T. Garbutt, Dianna Liu
  • Preemergence weed control using plant portein hydrolysate
    Patent number: 5290749
    Abstract: A method of selectively inhibiting growth of unwanted plants in a plot of soil is provided comprising the application of a plant protein hydrolysate to the plot of soil, prior to emergence of the unwanted plants and at a concentration of application which inhibits the growth of the unwanted plants.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: March 1, 1994
    Assignees: Iowa State University Research Foundation, Inc., Grain Processing Corporation
    Inventors: Nick E. Christians, John T. Garbutt, Dianna Liu