Patents by Inventor Markus Fronhöfer

Markus Fronhöfer 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).

  • Accordion filter with a protective mask
    Patent number: 6299660
    Abstract: A filter element that is able to be sealingly secured in position in a filter housing, comprising an accordion fold pack. The oncoming-flow side of accordion fold pack is covered by a latticed protective mask. The protective mask is sealingly joined to all fold backs of accordion fold pack on the clean-air side. In this manner, the fold edges are protected from damage during the periodic cleaning in the face of the back-blasted air used for that purpose.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: October 9, 2001
    Assignee: Firma Carl Freudenberg
    Inventors: Peter Pfeuffer, Hans-Joachim Lippold, Markus Fronhöfer, Hans Leibold