Patents by Inventor Richard F. Durchholz

Richard F. Durchholz 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: 4100306
    Abstract: An improved instant coffee is prepared by subjecting roast and finely ground coffee particles of 5-800 microns to devolatilization and extraction operations under conditions which sustain the freshness of a desirable coffee volatiles and soluble solids. A semi-bed of mechanically fluidized roasted and ground coffee particles is sprayed with 32.degree.-110.degree. F water and contacted with steam for devolatilization under an absolute pressure of 5-100 mm of Hg and a temperature of 32.degree.-110.degree. F. The resulting volatiles-laden steam is then condensed under an absolute pressure of about 4-80 mm of Hg and under supercooling conditions to provide a frost. A coffee volatiles-containing concentrate is made from that frost by contacting it with an aqueous coffee extract. Valuable coffee solids remaining in the devolatilized roast and fine ground coffee particles are extracted therefrom by a slurry extraction operation.
    Type: Grant
    Filed: February 5, 1976
    Date of Patent: July 11, 1978
    Assignee: The Procter & Gamble Company
    Inventors: Richard Gregg, James A. Weikel, Jayantilal M. Patel, Richard F. Durchholz