Patents by Inventor Christian Hassman

Christian Hassman 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).

  • Filter medium
    Patent number: 8465564
    Abstract: The present invention relates to a method for the manufacture of a multilayered filter medium whose air permeability is at least 500 l/m2sec and a multilayered filter medium obtainable by said method which, when charged with 5 mg/cm2 SAE-dust of the class “fine”, exhibits a pressure increase of no more than 100 Pa.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: June 18, 2013
    Assignee: Johns Manville
    Inventors: Christian Hassman, Jörg Lehnert, Hans-Juergen Meitinger
  • FILTER MEDIUM
    Publication number: 20100307338
    Abstract: The present invention relates to a method for the manufacture of a multilayered filter medium whose air permeability is at least 500 l/m2sec and a multilayered filter medium obtainable by said method which, when charged with 5 mg/cm2 SAE-dust of the class “fine”, exhibits a pressure increase of no more than 100 Pa.
    Type: Application
    Filed: May 18, 2010
    Publication date: December 9, 2010
    Inventors: Christian Hassman, Jörg Lehnert, Hans-Juergen Meitinger