Patents by Inventor Birgit Flaig

Birgit Flaig 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).

  • Coolant based on azole derivatives containing 1,3-propanediol for fuel cell cooling systems
    Publication number: 20060027782
    Abstract: Antifreeze concentrates for cooling systems in fuel cell drives, from which ready-to-use aqueous coolant compositions having a conductivity of not more than 50 ?S/cm result, based on 1,3-propanediol or mixtures of 1,3-propanediol with alkylene glycols and/or derivatives thereof, containing one or more five-membered heterocyclic compounds (azole derivatives) having 2 or 3 hetero atoms from the group consisting of nitrogen and sulfur, which contain no sulfur atom or not more than one sulfur atom and which may carry an aromatic or saturated six-membered fused moiety.
    Type: Application
    Filed: December 3, 2003
    Publication date: February 9, 2006
    Inventors: Bernd Wenderoth, Birgit Flaig