Patents by Inventor Detlef Bumann

Detlef Bumann 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).

  • Polyphenylsulfone-polytetrafluoroethylene blend for anti-wear tapes in flexible oil pipes
    Patent number: 9040135
    Abstract: The invention relates to an improved blend of polyphenylsulfone (PPSU) and polytetrafluoroethylene (PTFE) for producing friction-reducing tapes (anti-wear tapes) used as a friction-reducing intermediate layer in flexible fluid pipes, e.g. oil pipes.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: May 26, 2015
    Assignee: Evonik Röhm GmbH
    Inventors: Detlef Bumann, Albert Drexler, Ricardo Luiz Willemann
  • POLYPHENYLSULFONE-POLYTETRAFLUOROETHYLENE BLEND FOR ANTI-WEAR TAPES IN FLEXIBLE OIL PIPES
    Publication number: 20130230677
    Abstract: The invention relates to an improved blend of polyphenylsulfone (PPSU) and polytetrafluoroethylene (PTFE) for producing friction-reducing tapes (anti-wear tapes) used as a friction-reducing intermediate layer in flexible fluid pipes, e.g. oil pipes.
    Type: Application
    Filed: December 1, 2011
    Publication date: September 5, 2013
    Applicant: Evonik Roehm GmbH
    Inventors: Detlef Bumann, Albert Drexler, Ricardo Luiz Willemann
  • Fire-retarding sheet material having a metallic effect
    Patent number: 8303864
    Abstract: Flame-retardant plastics mouldings composed of polyphenyl sulphones (PPSUs) or of polycarbonates (PCs) are coloured with Iridoin® pigments in such a way as to have a metallic effect. The effect is resistant to the usual stresses present in an aircraft cabin and complies with the respective fire-protection requirements.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: November 6, 2012
    Assignee: Evonik Rohm GmbH
    Inventor: Detlef Bumann
  • POLYPHENYLSULPHONE-POLYTETRAFLUOROETHYLENE COMPOSITIONS AND USE THEREOF
    Publication number: 20120114890
    Abstract: The invention relates to a method for producing plastic molded bodies, characterised in that the two plastic materials PPSU and PTFE are mixed with one another at a temperature of 340 degrees Celsius to 385 degrees Celsius in an extruder, the resulting compound is granulated and the granules are extruded into plastic molded bodies at a screw temperature of 370 degrees Celsius to 390 degrees Celsius. The plastic molded bodies obtained are used as anti-wear tapes in oil delivery pipes.
    Type: Application
    Filed: May 25, 2010
    Publication date: May 10, 2012
    Applicant: EVONIK ROEHM GmbH
    Inventors: Detlef Bumann, Albert Drexler, Ricardo Luiz Willemann
  • Fire-Retarding Sheet Material Having a Metallic Effect
    Publication number: 20070228342
    Abstract: Flame-retardant plastics mouldings composed of polyphenyl sulphones (PPSUs) or of polycarbonates (PCs) are coloured with Iridoin® pigments in such a way as to have a metallic effect. The effect is resistant to the usual stresses present in an aircraft cabin and complies with the respective fire-protection requirements.
    Type: Application
    Filed: June 16, 2005
    Publication date: October 4, 2007
    Applicant: ROEHM GMBH
    Inventor: Detlef Bumann
  • Polycarbonate composite material which can be thermoplastically shaped, methods for the production thereof, use of the same and a flame-proof polycarbonate moulded part
    Patent number: 6872798
    Abstract: The invention relates to a polycarbonate composite material which can be thermoplastically shaped and which comprises at least two layers. The invention is characterised in that at least one layer comprises an LOI value of lower than 29 and at least one layer comprises an LOI value of higher than 29. The invention also relates to methods for producing said material, the use of the same and flame-proof polycarbonate moulded parts.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: March 29, 2005
    Assignee: Roehm GmbH & Co., KG
    Inventors: Detlef Bumann, Andreas Fetzer, Michael Meier-Kaiser
  • Polycarbonate composite material which can be thermoplastically shaped, methods for the production thereof, use of the same and a flame-proof polycarbonate moulded part
    Publication number: 20040062933
    Abstract: The invention relates to a polycarbonate composite material which can be thermoplastically shaped and which comprises at least two layers. The invention is characterised in that at least one layer comprises an LOI value of lower than 29 and at least one layer comprises an LOI value of higher than 29. The invention also relates to methods for producing said material, the use of the same and flame-proof polycarbonate moulded parts.
    Type: Application
    Filed: November 5, 2003
    Publication date: April 1, 2004
    Inventors: Detlef Bumann, Andreas Fetzer, Michael Meier-Kaiser