Patents by Inventor Mario Rettschlag

Mario Rettschlag 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).

  • Patent number: 8404278
    Abstract: The invention relates to a polyimide microparticles which can be obtained by means of the following steps: a) a polymer solution consisting of at least one polyimide polymer and a solvent or a solvent mixture is produced according to methods known per se, b) microparticles are formed from the polymer solution by spraying or by thermal phase inversion, c) the microparticles obtained in step b) are treated with an aqueous functionalization solution containing an amine-containing modifier at a high temperature, with or without stirring, and d) the modified obtained are washed and optionally dried, according to methods known per se.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: March 26, 2013
    Assignee: Helmholtz-Zentrum Geesthacht Zentrum fur Material und Kusten forschung GmbH
    Inventors: Wolfgang Albrecht, Roland Hilke, Karola Lützow, Mario Rettschlag, Filiana Santoso, Thomas Weigel
  • Publication number: 20050163860
    Abstract: The invention relates to a polyimide microparticles which can be obtained by means of the following steps: a) a polymer solution consisting of at least one polyimide polymer and a solvent or a solvent mixture is produced according to methods known per se, b) microparticles are formed from the polymer solution by spraying or by thermal phase inversion, c) the microparticles obtained in step b) are treated with an aqueous functionalization solution containing an amine-containing modifier at a high temperature, with or without stirring, and d) the modified obtained are washed and optionally dried, according to methods known per se.
    Type: Application
    Filed: March 22, 2005
    Publication date: July 28, 2005
    Inventors: Wolfgang Albrecht, Roland Hilke, Karola Lutzow, Mario Rettschlag, Filiana Santoso, Thomas Weigel