Patents by Inventor Hans Hoorn

Hans Hoorn 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 resolution of tamsulosin and compounds, compositions, and processes associated therewith
    Publication number: 20050096394
    Abstract: Optically impure tamsulosin including racemic tamsulosin can be resolved into optically pure (R)— or (S)-tamsulosin by the use of diastereomeric sulfonate salts of tamsulosin in a fractional crystallization technique. Racemic tamsulosin free base is a useful starting material for the resolution process and a method of obtaining the same in solid form, including two crystalline polymorphic forms, is also provided.
    Type: Application
    Filed: November 15, 2004
    Publication date: May 5, 2005
    Inventors: Hans Hoorn, Theodorus Peters, Jaroslav Pis, Radim Scigel
  • Amlodipine salt forms and processes for preparing them
    Patent number: 6828339
    Abstract: Amlodipine besylate forms are described, including amlodipine besylate hydrates and novel amlodipine besylate anhydrates. A method of making various amlodipine besylate forms from an aqueous medium as well as the use of the same as a calcium channel blocker are described.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: December 7, 2004
    Assignee: Synthon BV
    Inventors: Gerrit J. B. Ettema, Hans Hoorn, Jacobus M. Lemmens
  • Amlodipine salt forms and processes for preparing them
    Publication number: 20030139455
    Abstract: Amlodipine besylate forms are described, including amlodipine besylate hydrates and novel amlodipine besylate anhydrates. A method of making various amlodipine besylate forms from an aqueous medium as well as the use of the same as a calcium channel blocker are described.
    Type: Application
    Filed: November 20, 2002
    Publication date: July 24, 2003
    Inventors: Gerrit J. B. Ettema, Hans Hoorn, Jacobus M. Lemmens