Patents by Inventor Harrie R. De Lange

Harrie R. De Lange 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).

  • Method of isolating sterols in commercial quantities from sterol-containing material
    Patent number: 4664807
    Abstract: The invention relates to a method of isolating sterols in commercial quantities from sterol-containing material by subjecting a solution of this material to a column-chromatographic separation; for isolating cholesterol from cholesterol-containing material, silica gel is preferably used as a column packing and a mixture of, for example, heptane and acetone is preferably used as an eluent.
    Type: Grant
    Filed: November 29, 1985
    Date of Patent: May 12, 1987
    Assignee: Duphar International Research B.V.
    Inventors: Mathieu J. D. Van Dam, Harrie R. De Lange, Robert Grande