Patents by Inventor Harold H. Roth

Harold H. 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).

  • Coated nutrients and medicaments for veterinary use
    Patent number: 4199561
    Abstract: An imidazoline modified styrene-acrylonitrile polymer composition which is substantially insoluble in aqueous media at about pH 6 or more but swellable or soluble at pH 3 or less is employed as a coating for nutrient or therapeutic substances for administration to ruminants. The substances thus are rendered resistant to attack and breakdown in the rumen yet remain susceptible to release and digestion within the abomasum or small intestine of the animal.
    Type: Grant
    Filed: February 26, 1979
    Date of Patent: April 22, 1980
    Assignee: The Dow Chemical Company
    Inventors: Harold H. Roth, Peter W. Owen, Thomas T. Chiu