Patents by Inventor Michael Lennartz

Michael Lennartz 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).

  • Yellow anionic disazo dyes
    Publication number: 20050172420
    Abstract: The present invention relates to novel yellow anionic dyes, a process for their preparation, certain novel intermediates necessary for their preparation and the use of these dyes for dyeing natural or synthetic materials, in particular, paper.
    Type: Application
    Filed: May 27, 2003
    Publication date: August 11, 2005
    Inventors: Michael Lennartz, Adolf Kaser, Sandra Weiss