Patents by Inventor Robert M. Ellsworth

Robert M. Ellsworth 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).

  • Removal of sulfides from alcoholic beverages
    Patent number: 5744183
    Abstract: Wines and other alcoholic beverages are treated to remove sulfides by passing the beverage through a filter medium comprising polyvinyl polypyrrolidone, polyvinylimidazole, or a copolymer of the monomers of these two polymers, the polymer or copolymer having been pretreated with a solution of a metallic salt, preferably copper sulfate or silver nitrate.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: April 28, 1998
    Inventors: Robert M. Ellsworth, Gordon Burns