Patents by Inventor Andreas Pfefferkorn

Andreas Pfefferkorn 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).

  • Publication number: 20070067926
    Abstract: The present patent application relates to an agent for oxidative coloring of keratin fibers, containing a combination of 2-amino-5-ethylphenol and at least one m-aminophenol of general Formula (I) wherein R1=H or C2H4OH; R2=CH3 or C2H5, and R3=H or CH3; wherein R2 is not equal to CH3, if R1 and R3 equal H; or physiologically compatible, water-soluble salts thereof.
    Type: Application
    Filed: September 20, 2006
    Publication date: March 29, 2007
    Inventors: Manfred Schmitt, Gabricle de Waal, Annelie Dohling, Andreas Pfefferkorn