Patents by Inventor Dominik Stefan STÄMPFLI

Dominik Stefan STÄMPFLI 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).

  • O-demethylating process of methoxy substituted morphinan-6-one derivatives
    Patent number: 10005791
    Abstract: The present invention relates to an improved process for O-demethylating methoxy substituted morphinan-6-one derivatives using AlCl3 as a demethylating agent in a reaction-inert solvent having a water content ranging from 0.1% wt to 0.8% wt. 10.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: June 26, 2018
    Assignee: Noramco GmbH
    Inventors: Georg Ulrich Weigl, Dominik Stefan Stämpfli, Nelli Maurer
  • O-DEMETHYLATING PROCESS OF METHOXY SUBSTITUTED MORPHINAN-6-ONE DERIVATIVES
    Publication number: 20170022211
    Abstract: The present invention relates to an improved process for O-demethylating methoxy substituted morphinan-6-one derivatives using AlCl3 as a demethylating agent in a reaction-inert solvent having a water content ranging from 0.1% wt to 0.8% wt.
    Type: Application
    Filed: April 7, 2015
    Publication date: January 26, 2017
    Applicant: CILAG AG
    Inventors: Georg Ulrich WEIGL, Dominik Stefan STÄMPFLI, Nelli MAURER