Patents by Inventor Wilfried Thiel

Wilfried Thiel 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).

  • Modifications of 2-amino-4-(4-fluorobenzylamino)-1-ethoxycarbonylaminobenzene, and processes for their preparation
    Patent number: 6538151
    Abstract: The invention relates to novel modifications of the compound 2-amino-4-(4-fluorobenzylamino)-1-ethoxy-carbonylaminobenzene of the processes for their preparation and their use in pharmaceutical compositions.
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: March 25, 2003
    Assignee: Asta Medica Aktiengesellschaft
    Inventors: Peter Meisel, Karl-Friedrich Landgraf, Jürgen Schäfer, Wilfried Thiel, Matthias Rischer, Alfred Olbrich, Bernhard Kutscher
  • Process for the production of 1,2,4-triaminobenzene carbamic acid esters
    Publication number: 20030023111
    Abstract: A process for the production of 1,2,4-triaminobenzene carbamic acid esters is described, said process being characterised by the use of pyrocarbonate or polypyrocarbonate. The use of pyrocarbonate or polypyrocarbonate brings about a rise in yield and increased purity of the product.
    Type: Application
    Filed: July 24, 2002
    Publication date: January 30, 2003
    Inventors: Hans-Joachim Lankau, Klaus Unverferth, Thomas Arnold, Jurgen Schaefer, Peter Meisel, Wilfried Thiel
  • Modifications of 2-amino-4-(4-5fluorobenzylamino)-1-ethoxycarbonylaminobenzene, and processes for their preparation
    Patent number: 5914425
    Abstract: The invention relates to novel modifications of the compound 2-amino-4-(4-fluorobenzylamino)-1-ethoxy-carbonylaminobenzene of the formula I ##STR1## processes for their preparation and their use in pharmaceutical compositions.
    Type: Grant
    Filed: January 9, 1998
    Date of Patent: June 22, 1999
    Assignee: ASTA Medica Aktiengesellschaft
    Inventors: Peter Meisel, Karl-Friedrich Landgraf, Jurgen Schafer, Wilfried Thiel, Matthias Rischer, Alfred Olbrich, Bernhard Kutscher