Patents by Inventor Rudolf J. Hsieh

Rudolf J. Hsieh 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: 5302405
    Abstract: A method for removing cholesterol and fat from egg and a reduced cholesterol egg product. An anionic chelating agent which forms a complex with the lipoprotein fraction of egg yolk is added to dilute egg yolk to form a precipitate comprising a complex of lipoprotein and the anionic chelating compound. The solid, complex-containing precipitate is separated from the aqueous fraction. Thereafter, lipids and cholesterol are separated from the precipitated lipoprotein-containing complexes to obtain protein-containing complexes. The egg product comprises the protein-containing complex, fat essentially free of cholesterol, and liquid egg white.
    Type: Grant
    Filed: August 31, 1992
    Date of Patent: April 12, 1994
    Assignee: Campbell Soup Company
    Inventors: Rudolf J. Hsieh, Donald P. Snyder, Eugene W. Ford
  • Patent number: 5091203
    Abstract: Edible oil containing monoglyceride is emulsified with a mixture of cholesterol-containing egg in aqueous solution. Then, the mixture is heated and typically is stirred gently to ensure intimate admixture of the oil phase in the aqueous phase. The monoglyceride serves to facilitate oil/lipoprotein interaction in the presence of aqueous phase. The fat in the egg is partitioned into the monoglyceride-containing oil phase. Agitation is continued for a time sufficient to exchange or extract cholesterol and fat from the aqueous phase to the oil phase. The cholesterol- and fat-reduced aqueous phase is the desired low-cholesterol egg product, and is separated from the cholesterol-enriched oil phase.
    Type: Grant
    Filed: December 1, 1989
    Date of Patent: February 25, 1992
    Assignee: Campbell Soup Company
    Inventors: Joseph A. Conte, Jr., Bobby R. Johnson, Rudolf J. Hsieh, Sandy S. Ko