Patents by Inventor Philip Graham Humphrey

Philip Graham Humphrey 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).

  • Black leaf tea
    Patent number: 6036991
    Abstract: A leaf tea especially blended from a black tea and a green tea so that it contains catechins and phenols in a ratio between 0.15 to 0.4, but preferably between 0.2 and 0.3. Such a product resembles black tea but typically possesses an antioxidant activity that is 10% or more higher than that the same mass of the black tea alone. The black tea is preferably low grown while the green tea is preferably from an Assam jat.
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: March 14, 2000
    Assignee: Lipton, Division of Conopco, Inc.
    Inventors: Philip Graham Humphrey, Paul Thomas Quinlan