Patents by Inventor John P. Friedrich

John P. Friedrich 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).

  • Production of food-grade corn germ product by supercritical fluid extraction
    Patent number: 4495207
    Abstract: A high-protein, food-grade product is prepared by defatting dry-milled corn germ fractions with carbon dioxide under supercritical conditions. The residual lipid and peroxidase activity responsible for development of off-flavors during storage are reduced to a fraction of the levels obtainable by conventional hexane extraction methods.
    Type: Grant
    Filed: October 25, 1982
    Date of Patent: January 22, 1985
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Donald D. Christianson, John P. Friedrich
  • Production of defatted soybean products by supercritical fluid extraction
    Patent number: 4493854
    Abstract: The raw grassy and bitter principles in soybeans are reduced to acceptable levels for purposes of human consumption without significant degradation of the nutritional properties. This result is achieved by a lipid extraction process in which raw soybean material is treated with carbon dioxide under carefully controlled supercritical conditions. Of particular importance are the moisture content of the bean material as well as the pressure, temperature, and contact time of the carbon dioxide extractant.
    Type: Grant
    Filed: September 20, 1983
    Date of Patent: January 15, 1985
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: John P. Friedrich, Arthur C. Eldridge
  • Supercritical CO.sub.2 extraction of lipids from lipid-containing materials
    Patent number: 4466923
    Abstract: In the extraction of lipid-containing substances with supercritical CO.sub.2, triglyceride solubilities of up to 20% or more are obtainable by the simultaneous application of temperatures in excess of about 60.degree. C. and pressures of at least 550 bar.
    Type: Grant
    Filed: April 1, 1982
    Date of Patent: August 21, 1984
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventor: John P. Friedrich