Patents by Inventor Helmut Hanert

Helmut Hanert 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).

  • Biofilter System and Method for Purifying Gases Escaping From a Gully Hole
    Publication number: 20080044888
    Abstract: The invention relates to a method for purifying gases escaping from a gully hole (1), particularly escaping from a sewer (8) guided at the bottom (7) of the gully hole (1) by means of a biofilter that is arranged inside the gully hole (1) in such a manner that the gases flow through it before they leave the gully hole (1). The biofilter is mounted at such a distance to the sewer (8) that its temperature and moisture are substantially influenced by the waste water (17) present in the sewer (8).
    Type: Application
    Filed: March 5, 2004
    Publication date: February 21, 2008
    Inventors: Peter Harborth, Helmut Hanert, Matthias Nieber