Patents by Inventor Gerrit Duijf

Gerrit Duijf 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).

  • Use of caramel color for augmenting or enhancing or intensifying the color of natural red dyestuffs
    Patent number: 4118516
    Abstract: A composition which is a natural red dyestuff composed of two ingredients:(i) A natural red purple dye such as an anthocyanin (e.g. red cabbage dye) or a betalaine (e.g. a red beet dye); and(ii) Caramel color.The composition is stabilized with ascarbic acid and is useful in foodstuffs, chewing gum and medicinals.
    Type: Grant
    Filed: May 26, 1977
    Date of Patent: October 3, 1978
    Assignee: International Flavors & Fragrances Inc.
    Inventors: Michel Van Praag, Gerrit Duijf