Patents by Inventor Peter D. Leathwood

Peter D. Leathwood 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).

  • Process for the preparation of a powdered extract of valerian roots
    Patent number: 5211948
    Abstract: An aqueous extract of valerian roots is concentrated to concentrate the extract and to eliminate odors which are volatile and which are produced by degradation products of valepotriates. An alcohol or acetone is added to the concentrated valerian extract to precipitate insoluble solids from the concentrated extract. The precipitated solids are separated from the extract, after which the extract is mixed with a carbohydrate and then dried to obtain a powder.
    Type: Grant
    Filed: April 29, 1992
    Date of Patent: May 18, 1993
    Assignee: Nestec S.A.
    Inventors: Leon Cerise, Peter D. Leathwood, Tito L. Lunder