Patents by Inventor William B. Roth

William B. Roth 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).

  • Methanol treated activated sludge as an agricultural chemical carrier
    Patent number: 4065287
    Abstract: A novel means for the sustained release of agricultural chemicals is provided by a methanol treated activated sludge carrier. The viscous polymeric carrier has application in forming sprayable films, granular pellets, and seed coatings which are resistant to natural mechanisms of chemical loss.
    Type: Grant
    Filed: June 17, 1976
    Date of Patent: December 27, 1977
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventor: William B. Roth