Patents by Inventor Gerd W. Michel

Gerd W. Michel 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 and composition for the purification of amphotericin B
    Patent number: 4902789
    Abstract: A unique four-solvent system comprising methanol, dimethylformamide, methylene chloride and water is employed to provide an improved process for the purification and crystallization of amphotericin B.
    Type: Grant
    Filed: October 27, 1987
    Date of Patent: February 20, 1990
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Gerd W. Michel, Wilbur L. Bryan, Elizabeth Bryan
  • Process for the purification of amphotericin B and A solubilizing media useful in that process
    Patent number: 4177265
    Abstract: Acetone or methanol saturated with sodium iodide or sodium thiocyanate are useful solubilizing media for amphotericin B.
    Type: Grant
    Filed: March 2, 1977
    Date of Patent: December 4, 1979
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Gerd W. Michel, Elizabeth A. Fralick