Patents by Inventor Richard M. Hopefl

Richard M. Hopefl 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).

  • Coloring of fruit
    Patent number: 4442104
    Abstract: A process for artificially coloring fruit wherein an aqueous medium containing the fruit is treated with a colorant and a hydrolyzable tannin at an adequate temperature until the desired quantities of colorant and hydrolyzable tannin are absorbed by the fruit, the pH is lowered at least to a value at which the colorant becomes substantially insoluble, after which the pH is raised gradually while ensuring that the pH of the inner parts of the fruit does not exceed 7 and finally the fruit is separated from the aqueous medium.
    Type: Grant
    Filed: January 4, 1983
    Date of Patent: April 10, 1984
    Assignee: Societe d'Assistance Technique pour Produits Nestle S.A.
    Inventors: Elaine R. Wedral, Richard M. Hopefl, Rufus A. Ivie