Patents by Inventor Frank S. Model

Frank S. Model 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).

  • Herbicide-filled cellulose ester particles having controlled release properties
    Patent number: 4111684
    Abstract: A water-leachable herbicide occupies the voids, or channels, of a particulate, substantially water-impermeable porous cellulose ester carrier which provides controlled release of the herbicide into soil.
    Type: Grant
    Filed: April 28, 1977
    Date of Patent: September 5, 1978
    Assignee: Celanese Corporation
    Inventors: Norman W. Thomas, Frank S. Model, Charles L. Smart