Patents by Inventor Peter Dudley Collier

Peter Dudley Collier 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).

  • Extracting tea using an aqueous solution of ammonium bicarbonate or ammonia
    Patent number: 3971858
    Abstract: The yield in the aqueous extraction of tea leaf is improved by using an aqueous solution of ammonium bicarbonate or of ammonia as the extractant.
    Type: Grant
    Filed: August 30, 1974
    Date of Patent: July 27, 1976
    Assignee: Thomas J. Lipton, Inc.
    Inventors: Peter Dudley Collier, Alistair Penman, Frederick John Trussell