Patents by Inventor John C. Proudley

John C. Proudley 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).

  • Products from treatment of black tea
    Patent number: 5250317
    Abstract: Black tea leaves are oxidized to provide treated leaves from which aqueous tea extracts which have minimal turbidity, particularly when cooled, may be obtained. The oxidation reaction is performed on black tea leaves which contain moisture only in an amount such that the oxidation reaction occurs at localized sites on and within the tea leaf structure.
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: October 5, 1993
    Assignee: Nestec S.A.
    Inventors: Richard T. Liu, John C. Proudley
  • Oxidation of tea
    Patent number: 5139802
    Abstract: Green and Oolong tea leaves are oxidized to alter the organoleptic and aesthetic characteristics of aqueous extracts obtained therefrom and to provide extracts which have minimal turbidity, particularly when cooled. The oxidation reaction is performed on leaves which contain moisture only in an amount such that the oxidation reaction occurs at localized sites on and within the tea leaf structure.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: August 18, 1992
    Assignee: Nestec S.A.
    Inventors: Richard T. Liu, John C. Proudley
  • Treatment of black tea
    Patent number: 5130154
    Abstract: Black tea leaves are oxidized to provide treated leaves from which aqueous tea extracts which have minimal turbidity, particularly when cooled, may be obtained. The oxidation reaction is performed on black tea leaves which contain moisture only in an amount such that the oxidation reaction occurs at localized sites on and within the tea leaf structure.
    Type: Grant
    Filed: February 19, 1992
    Date of Patent: July 14, 1992
    Assignee: Nestec S.A.
    Inventors: Richard T. Liu, John C. Proudley
  • Decaffeination process
    Patent number: 4837038
    Abstract: Caffeine-containing vegetable materials are decaffeinated by contacting the vegetable materials with a substantially laminar flow of a fatty material having a superficial velocity of at least about 10.times.10.sup.-3 m/sec. Recycling of the fatty material may be also carried out in one or more extraction vessels.
    Type: Grant
    Filed: February 2, 1988
    Date of Patent: June 6, 1989
    Assignee: Nestec SA
    Inventors: John C. Proudley, William S. Symbolik