Patents by Inventor Claus Boettcher

Claus Boettcher 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).

  • Wet strength enhancers for paper
    Patent number: 8025767
    Abstract: They are mixtures of (a) from 1 to 99.9% by weight of a water-soluble epihalohydrin-crosslinked polyamidoamine and (b) from 0.1 to 20% by weight of at least one other cationic polymer.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: September 27, 2011
    Assignee: BASF Aktiengesellschaft
    Inventors: Ellen Krueger, Martin Wendker, Stefan Frenzel, Claus Boettcher