Patents by Inventor Stefan Ritsert

Stefan Ritsert 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).

  • Memantine-containing solid pharmaceutical dosage forms having an extended two-stage release profile and production thereof
    Patent number: 5382601
    Abstract: The present invention provides solid pharmaceutical compositions in dosage form containing an active ingredient or principle, preferably memantine, which exhibit an extended two-phase release profile and which are characterized by the presence of both a water-soluble and a water-insoluble salt of casein, preferably sodium and calcium caseinate, in the matrix thereof, in broad proportions and in a total amount between 5 and 98% by weight of the composition, and with a process for the production thereof.
    Type: Grant
    Filed: July 23, 1993
    Date of Patent: January 17, 1995
    Assignee: Merz + Co. GmbH & Co.
    Inventors: Eberhard Nurnberg, Erhard Seiller, Stefan Ritsert