Patents by Inventor Bernhard Freund

Bernhard Freund 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).

  • Retard form of pharmaceuticals with insoluble porous diffusion coatings
    Patent number: 4459279
    Abstract: A pharmaceutical dosage unit retard form having a constant, pH-independent release rate of active ingredient, consisting of a core comprising an active ingredient, and a semi-permeable diffusion coating over the core, where the coating consists of a water-insoluble film-former, a water-soluble polymer and eventually an acid-insoluble polymer incorporated therein.
    Type: Grant
    Filed: August 18, 1982
    Date of Patent: July 10, 1984
    Assignee: Boehringer Ingelheim GmbH
    Inventors: Herbert Stricker, Bernhard Freund, Heribert Harwalik, Karl L. Rominger, Siegfried Darda, Volkmar Haselbarth, Dietrich Arndts, Wolf D. Bechtel, Gerhard Bozler, Rolf Brickl, Peter Gruber
  • Retard form of pharmaceuticals with insoluble porous diffusion coatings
    Patent number: 4361546
    Abstract: A pharmaceutical dosage unit retard form having a constant, pH-independent release rate of active ingredient, consisting of a core comprising an active ingredient, and a semi-permeable diffusion coating over the core, were the coating consists of a water-insoluble film-former, a water-soluble polymer and eventually an acid-insoluble polymer incorporated therein.
    Type: Grant
    Filed: June 15, 1981
    Date of Patent: November 30, 1982
    Assignee: Boehringer Ingelheim GmbH
    Inventors: Herbert Stricker, Bernhard Freund, Heribert Harwalik, Karl L. Rominger, Siegfried Darda, Volkmar Haselbarth, Dietrich Arndts, Wolf D. Bechtel, Gerhard Bozler, Rolf Brickl, Peter Gruber