Patents by Inventor Ralph L. Colton

Ralph L. Colton 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).

  • Patent number: 4983408
    Abstract: A method for producing a coffee extract which comprises: (1) contacting an aqueous mixture of ground roast coffee with steam under pressure at elevated temperatures followed by rapid decompression at atmospheric levels; and (2) treatment of the resulting mixture with a hydrolytic enzyme or with a mixture of hydrolytic enzymes. The coffee extract thus obtained is a concentrated liquid which can be made into a beverage by the addition of water or it may be dried to a soluble solid and reconstituted with water to provide instant coffee.
    Type: Grant
    Filed: December 7, 1988
    Date of Patent: January 8, 1991
    Inventor: Ralph L. Colton