Patents by Inventor Hhristo Bratschkov

Hhristo Bratschkov 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).

  • MEMBRANE FOR FUEL CELLS, CONTAINING POLYMERS COMPRISING PHOSPHONIC ACID GROUPS AND/OR SULFONIC ACID GROUPS, MEMBRANE UNITS AND THE USE THEREOF IN FUEL CELLS
    Publication number: 20090169955
    Abstract: Membrane for fuel cells, containing polymers comprising phosphonic acid and/or sulphonic acid groups, membrane electrode assemblies and the use thereof in fuel cells The present invention relates to a membrane for fuel cells, containing polymers comprising phosphonic acid and/or sulphonic acid groups, characterized in that the polymer comprising phosphonic acid and/or sulphonic acid groups can be obtained by copolymerisation of monomers comprising phosphonic acid and/or sulphonic acid groups and hydrophobic monomers.
    Type: Application
    Filed: October 28, 2006
    Publication date: July 2, 2009
    Applicant: BASF FUEL CELL GMBH
    Inventors: Oemer Uensal, Joerg Belack, Ivan Schopov, Vesselin Sinigersky, Hhristo Bratschkov, Stoicho Schenkov, Markus Klapper
  • MEMBRANE-ELECTRODE ASSEMBLIES AND LONG-LIFE FUEL CELLS
    Publication number: 20090098430
    Abstract: Polymer with high molecular weight which can be obtained by a method, in which a composition is polymerised by free-radical polymerisation which, based on its total weight, comprises at least 80.0% by weight of ethylenically unsaturated compounds, characterized in that the composition contains at least one monomer comprising phosphonic acid groups and/or sulphonic acid groups. The polymer has a weight average of the degree of polymerisation of more than 300 and due to its chemical and physical properties, is particularly suitable for polymer electrolyte membranes (PEM) in so-called PEM fuel cells.
    Type: Application
    Filed: October 28, 2006
    Publication date: April 16, 2009
    Inventors: Oemer Uensal, Joerg Belack, Ivan Schopov, Vesselin Sinigersky, Hhristo Bratschkov, Stoicho Schenkov