Patents by Inventor Astrid Halfmann

Astrid Halfmann 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).

  • Multilayer systems with at least one layer based on mesonorphic polyelectrolyte complexes method for producing them and their use
    Patent number: 6902810
    Abstract: A multicoat system comprising (I) at least one constituent (IA) comprising mesomorphic polyelectrolyte complexes prepared by reacting, in a liquid phase (IB), at least one polymeric and/or oligomeric, organic, anionic polyelectrolytes (IC) with at least one polymeric and/or oligomeric, organic, cationic polyelectrolytes (ID) and/or at least one cationic surfactant (IE) or at least one polymeric and/or oligomeric, organic, cationic polyelectrolytes (ID) with at least one anionic surfactant (IF) in a stoichiometric or non-stoichiometric ratio, pouring the resulting liquid phase (IG) onto a substrate or into a mold and allowing it to solidify, and heat-treating the resulting solid (IH); and (II) at least one coat (IIA), which is three-dimensionally crosslinked, prepared by applying at least one aqueous, thermally curable coating material (IIB) comprising at least one binder (IIC) and at least one crosslinking agent (IID), to the surface of the constituent (IA), and thermally curing the resulting wet film (IIE
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: June 7, 2005
    Assignee: BASF Coatings AG
    Inventors: Beate Podlaski-Pyzik, Astrid Halfmann, Wolfgang Bremser