Patents by Inventor Hans Neunhofer

Hans Neunhofer 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).

  • Tricyclic quinoxaline derivatives as a uv filter
    Publication number: 20040102446
    Abstract: The invention relates to the use of quinoxaline derivatives of formula I, represented by formulas 1a and 1b, as photostable UV filters, in particular in cosmetic and pharmaceutical preparations for protecting the human epidermis or human hair against UV radiation, above all in the 280-400 nm range.
    Type: Application
    Filed: September 8, 2003
    Publication date: May 27, 2004
    Inventors: Frank Pflucker, Michael Schwarz, Volker Scholz, Hans Neunhofer