Patents by Inventor Tilman Zipplies

Tilman Zipplies 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: 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
  • Process for the recovery of fluorinated alkandic acids from wastewater
    Patent number: 6518442
    Abstract: The invention relates to a method for removing fluorinated emulsifying agent acids from waste waters, characterized in that the finely dispersed solids in the waste water are stabilized with a nonionic or cationic surfactant or an analogous acting surface active substance, the fluorinated emulsifying agent acids are subsequently bonded on an anion exchange resin and the fluorinated emulsifying agent acids are eluted from the latter.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: February 11, 2003
    Assignees: Dyneon GmbH & Co., KG, Axiva GmbH
    Inventors: Bernd Felix, Tilman Zipplies, Stephan Führer, Thomas Kaiser, Armin Budesheim
  • 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
  • Free-flowing polytetrafluoroethylene molding powder
    Patent number: 6100318
    Abstract: Free-flowing polytetrafluoroethylene molding powders are obtained if a finely divided non free-flowing powder of an optionally modified polytetrafluoroethylene is agglomerated in an aqueous medium which contains a trialkylamine oxide and the agglomerates are dried.
    Type: Grant
    Filed: January 9, 1997
    Date of Patent: August 8, 2000
    Assignee: Dyneon GmbH
    Inventor: Tilman Zipplies
  • 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
  • Process for producing an agglomerated molding powder composed of polytetrafluoroethylene and hydrophobic fillers
    Patent number: 5216068
    Abstract: The properties of agglomerated molding powders of PTFE and hydrophobic fillers are improved if the agglomerates are washed after completing the agglomerating process with a liquid medium which contains a surface-active agent.
    Type: Grant
    Filed: December 13, 1990
    Date of Patent: June 1, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Tilman Zipplies