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Stephen Dowdeswell

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  • West Sussex, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Multi-stage turbomolecular pump
    • Patent number 12,286,974
    • Issue date Apr 29, 2025
    • Edwards Limited
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Axial flow vacuum pump with curved rotor and stator blades
    • Patent number 12,110,896
    • Issue date Oct 8, 2024
    • Edwards Limited
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 12,018,691
    • Issue date Jun 25, 2024
    • Edwards Limited
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Temperature control of a pumped gas flow
    • Patent number 11,841,021
    • Issue date Dec 12, 2023
    • Edwards Limited
    • William Foote
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    Twin shaft pumps and a method of pumping
    • Patent number 11,401,935
    • Issue date Aug 2, 2022
    • Edwards Limited
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Gas transfer vacuum pump
    • Patent number 10,337,517
    • Issue date Jul 2, 2019
    • Edwards Limited
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump rotor for a vacuum pump having a roots pumping mechanism
    • Patent number 9,920,761
    • Issue date Mar 20, 2018
    • Edwards Limited
    • Nigel Paul Schofield
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Vacuum pump with longitudinal and annular seals
    • Patent number 9,551,333
    • Issue date Jan 24, 2017
    • Edwards Limited
    • Neil Turner
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Multi stage, clam shell vacuum pump
    • Patent number 9,279,426
    • Issue date Mar 8, 2016
    • Edwards Limited
    • Nigel Paul Schofield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Vacuum pump
    • Patent number 8,500,422
    • Issue date Aug 6, 2013
    • Edwards Limited
    • Stephen Dowdeswell
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Roots pumps
    • Patent number 8,500,425
    • Issue date Aug 6, 2013
    • Edwards Limited
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

  • Information Patent Application

    AXIAL FLOW VACUUM PUMP WITH CURVED ROTOR AND STATOR BLADES
    • Publication number 20230109154
    • Publication date Apr 6, 2023
    • Edwards Limited
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    VACUUM PUMP
    • Publication number 20230024392
    • Publication date Jan 26, 2023
    • Edwards Limited
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    MULTI-STAGE TURBOMOLECULAR PUMP
    • Publication number 20220049705
    • Publication date Feb 17, 2022
    • Edwards Limited
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    TEMPERATURE CONTROL OF A PUMPED GAS FLOW
    • Publication number 20200173444
    • Publication date Jun 4, 2020
    • Edwards Limited
    • William Foote
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    TWIN SHAFT PUMPS AND A METHOD OF PUMPING
    • Publication number 20200102958
    • Publication date Apr 2, 2020
    • Edwards Limited
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    ROTOR FOR PUMP
    • Publication number 20160097390
    • Publication date Apr 7, 2016
    • EDWARDS LIMITED
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    VACUUM PUMP
    • Publication number 20150377239
    • Publication date Dec 31, 2015
    • EDWARDS LIMITED
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Gas Transfer Vacuum Pump
    • Publication number 20150037137
    • Publication date Feb 5, 2015
    • EDWARDS LIMITED
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    ROTOR FOR PUMP
    • Publication number 20140079581
    • Publication date Mar 20, 2014
    • EDWARDS LIMITED
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    VACUUM PUMP WITH LONGITUDINAL AND ANNULAR SEALS
    • Publication number 20140017062
    • Publication date Jan 16, 2014
    • EDWARDS LIMITED
    • Neil Turner
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    MULTI STAGE, CLAM SHELL VACUUM PUMP
    • Publication number 20100226808
    • Publication date Sep 9, 2010
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    VACUUM PUMP
    • Publication number 20100119399
    • Publication date May 13, 2010
    • EDWARDS LIMITED
    • Stephen Dowdeswell
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    Vacuum Pump
    • Publication number 20070274822
    • Publication date Nov 29, 2007
    • Michael Chung Kau Liu
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...