Patents by Inventor Karla Ann Wilzer

Karla Ann Wilzer 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).

  • Dispersions of fluorescent whitening agents
    Patent number: 5976410
    Abstract: Disclosed are dispersions of fluorescent whitening agents which are suitable for the fluorescent whitening of coating compositions for coating paper or of fibre dispersions (paper pulps) in paper production.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: November 2, 1999
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Peter Rohringer, Rainer Hans Traber, Peter Ruf, Thomas Engelhardt, Karla Ann Wilzer