Patents by Inventor William W. Donald

William W. Donald 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).

  • Washer for plant roots and other articles
    Patent number: 4685481
    Abstract: A washing apparatus specifically designed for isolating plant roots from core soil samples is also suited for cleaning a variety of other organic and inorganic objects, particularly when surrounded by large volumes of soil. The essential features of the apparatus include a washing tank for holding a cleansing solvent, a support cradle for carrying cannisters of the samples to be cleaned, and a drive assembly for mobilizing the support cradle through the solvent in the washing tank.
    Type: Grant
    Filed: February 3, 1986
    Date of Patent: August 11, 1987
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Steven J. Carlson, William W. Donald, James J. Lepine