Patents by Inventor Werner Conrad

Werner Conrad 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).

  • Process for the preparation of an immunoglobulin which can be administered intravenously and is stable in liquid form
    Patent number: 4880913
    Abstract: The invention relates to a process for the preparation of an immunoglobulin which has no side effects, is stable on storage in liquid form and can be administered intravenously and which has a monomer content above 97%, in which euglobulins and other impurities are removed from a previously purified immunoglobulin solution by precipitation and adsorption on an ion exchanger, the immunoglobulin is stabilized by acid and heat treatment and is further purified by another ion exchanger treatment, and aggregated proteins are removed by precipitation with low molecular weight PEG. The solution is converted by ultra- and diafiltration into a form which can be used.
    Type: Grant
    Filed: December 2, 1987
    Date of Patent: November 14, 1989
    Assignee: Schwab & Co. Ges.m.b.H.
    Inventors: Walter Doleschel, Walter N. Doleschel, Werner Conrad