Patents by Inventor Franz-Rainer Weitzel

Franz-Rainer Weitzel 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).

  • Propellant-free aerosol formulation for inhalation
    Patent number: 9238031
    Abstract: The present invention relates to propellant-free aerosol formulations for inhalation containing ipratropium bromide and salbutamol.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: January 19, 2016
    Assignee: Boehringer Ingelheim International GmbH
    Inventors: Christel Schmelzer, Franz-Rainer Weitzel