Patents by Inventor Ernst Schonleitner

Ernst Schonleitner 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).

  • Process for removing pigments from waste paper
    Patent number: 4376011
    Abstract: A flotation composition for removing pigments from waste paper, which consists of a carboxylic acid ester and of from 0 to 10 weight %, referred to the ester of the above formulae, of a surfactant.
    Type: Grant
    Filed: October 14, 1980
    Date of Patent: March 8, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Fridolin Menschhorn, Ernst Schonleitner, Gerhard Teufel, Paul Wertheimer