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Ludger Alfes

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  • Dorsten, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Fluid energy machine having a tandem dry gas seal
    • Patent number 10,337,520
    • Issue date Jul 2, 2019
    • Siemens Aktiengesellschaft
    • Ludger Alfes
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Gas system for compressing a process gas
    • Patent number 9,568,014
    • Issue date Feb 14, 2017
    • Siemens Aktiengesellschaft
    • Ludger Alfes
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Shaft seal for a turbomachine
    • Patent number 8,985,587
    • Issue date Mar 24, 2015
    • Siemens Aktiengesellschaft
    • Ludger Alfes
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Arrangement comprising a shaft seal
    • Patent number 8,714,907
    • Issue date May 6, 2014
    • Siemens Aktiengesellschaft
    • Ludger Alfes
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Arrangement comprising a shaft seal
    • Patent number 8,647,052
    • Issue date Feb 11, 2014
    • Siemens Aktiengesellschaft
    • Ludger Alfes
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Method for operating a compressor device and associated compressor...
    • Patent number 8,529,217
    • Issue date Sep 10, 2013
    • Siemens Aktiengesellschaft
    • Ludger Alfes
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

  • Information Patent Application

    FLUID ENERGY MACHINE HAVING A TANDEM DRY GAS SEAL
    • Publication number 20170191486
    • Publication date Jul 6, 2017
    • Siemens Aktiengesellschaft
    • Ludger Alfes
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    TURBO MACHINE AND METHOD FOR THE OPERATION THEREOF
    • Publication number 20150322959
    • Publication date Nov 12, 2015
    • Siemens Aktiengesellschaft
    • Ludger Alfes
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    GAS SYSTEM FOR COMPRESSING A PROCESS GAS
    • Publication number 20140050569
    • Publication date Feb 20, 2014
    • SIEMENS AKTIENGESELLSCHAFT
    • Ludger Alfes
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    MULTISTAGE TURBOCOMPRESSOR
    • Publication number 20120093643
    • Publication date Apr 19, 2012
    • SIEMENS AKTIENGESELLSCHAFT
    • Ludger Alfes
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Shaft seal for a turbomachine
    • Publication number 20120043727
    • Publication date Feb 23, 2012
    • Ludger Alfes
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Arrangement Comprising a Shaft Seal
    • Publication number 20110255966
    • Publication date Oct 20, 2011
    • Ludger Alfes
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Arrangement comprising a shaft seal
    • Publication number 20110189013
    • Publication date Aug 4, 2011
    • Ludger Alfes
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Method for Operating a Compressor Device and Associated Compressor...
    • Publication number 20100303639
    • Publication date Dec 2, 2010
    • Ludger Alfes
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...