Patents by Inventor Charles Klass

Charles Klass 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).

  • High performance natural zeolite microparticle retention aid for papermaking
    Publication number: 20050269050
    Abstract: A microparticle retention aid for use in papermaking containing a high performance purified natural zeolite pigment is disclosed. Use of the pigment facilitates manufacture of papers with improved quality and economics. When used as filler, the novel zeolite pigment is readily retained and eliminates print-through in uncoated papers. The novel zeolite pigment is low in abrasion and provides improved coefficient of friction.
    Type: Application
    Filed: May 17, 2004
    Publication date: December 8, 2005
    Inventors: Charles Klass, Martin Sikora