Patents by Inventor Herbert Strasser

Herbert Strasser 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).

  • High purity fluoropolymers
    Patent number: 7148301
    Abstract: The invention relates to high purity fluoropolymers and processes for making such materials. These polymers are particularly suited for applications in the semiconductor industry. The process comprises removal of unstable polymer end groups by fluorination and removal of heavy metal impurities by extraction with an aqueous acid medium.
    Type: Grant
    Filed: December 22, 2003
    Date of Patent: December 12, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Thomas J. Blong, Denis Duchesne, Gernot Loehr, Albert Killich, Tilman Zipplies, Ralph Kaulbach, Herbert Strasser
  • High purity fluoropolymers
    Publication number: 20040132927
    Abstract: The invention relates to high purity fluoropolymers and processes for making such materials. These polymers are particularly suited for applications in the semiconductor industry. The process comprises removal of unstable polymer end groups by fluorination and removal of heavy metal impurities by extraction with an aqueous acid medium.
    Type: Application
    Filed: December 22, 2003
    Publication date: July 8, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Thomas J. Blong, Denis Duchesne, Gernot Loehr, Albert Killich, Tilman Zipplies, Ralph Kaulbach, Herbert Strasser
  • High purity fluoropolymers
    Patent number: 6693164
    Abstract: The invention relates to high purity fluoropolymers and processes for making such materials. These polymers are particularly suited for applications in the semiconductor industry. The process comprises removal of unstable polymer end groups by fluorination and removal of heavy metal impurities by extraction with an aqueous acid medium.
    Type: Grant
    Filed: May 23, 2001
    Date of Patent: February 17, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Thomas J. Blong, Denis Duchesne, Gernot Loehr, Albert Killich, Tilman Zipplies, Ralph Kaulbach, Herbert Strasser
  • High purity fluoropolymers
    Publication number: 20020013419
    Abstract: The invention relates to high purity fluoropolymers and processes for making such materials. These polymers are particularly suited for applications in the semiconductor industry. The process comprises removal of unstable polymer end groups by fluorination and removal of heavy metal impurities by extraction with an aqueous acid medium.
    Type: Application
    Filed: May 23, 2001
    Publication date: January 31, 2002
    Applicant: 3M Innovative Properties Company
    Inventors: Thomas J. Blong, Denis Duchesne, Gernot Loehr, Albert Killich, Tilman Zipplies, Ralph Kaulbach, Herbert Strasser
  • Degassing apparatus and use thereof
    Patent number: 5634963
    Abstract: An apparatus suitable in particular for degassing fluoropolymers which have been subjected to thermal degradation contains--in the direction of flow of the product--a product intake, a coolable conveyor section, a comminution apparatus, a heated conveyor section and a product discharge, the entire apparatus being designed to be gastight and advantageously being designed to be resistant to pressure surges and having a gas outlet in the area of the coolable conveyor section and/or in the area of the comminution apparatuses.
    Type: Grant
    Filed: October 23, 1995
    Date of Patent: June 3, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Herbert Strasser, Bernd Felix, Ulrich Reiff, Hans-Bodo Richter, Tilman Zipplies