Patents by Inventor Clara Nelson

Clara Nelson 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).

  • Naphthols useful for preparing indeno-fused photochromic naphthopyrans
    Publication number: 20070155964
    Abstract: Described are naphthols useful in the manufacture of novel indeno-fused photochromic naphthopyran materials.
    Type: Application
    Filed: March 1, 2007
    Publication date: July 5, 2007
    Inventors: Robert Walters, Anil Kumar, Clara Nelson, Anu Chopra