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Stephen F. Lindsey

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  • Richmond, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Rotary piston and cylinder device with single stator side
    • Patent number 11,859,495
    • Issue date Jan 2, 2024
    • Lontra Limited
    • Stephen Francis Lindsey
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Check valve
    • Patent number 11,859,724
    • Issue date Jan 2, 2024
    • Lontra Limited
    • Stephen Francis Lindsey
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Rotary piston and cylinder with the rotor including a formation and...
    • Patent number 11,536,139
    • Issue date Dec 27, 2022
    • Lontra Limited
    • Stephen Francis Lindsey
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Rotary piston and cylinder device with flared curved rotor surface
    • Patent number 11,519,268
    • Issue date Dec 6, 2022
    • Lontra Limited
    • Stephen Francis Lindsey
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Rotary piston and cylinder device having a dish ringed rotor
    • Patent number 11,319,812
    • Issue date May 3, 2022
    • LONTRA LIMITED
    • Stephen Francis Lindsey
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Rotary piston and cylinder device
    • Patent number 11,131,193
    • Issue date Sep 28, 2021
    • LONTRA LIMITED
    • Stephen Francis Lindsey
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Rotary piston and cylinder devices
    • Patent number 11,008,865
    • Issue date May 18, 2021
    • LONTRA LIMITED
    • Stephen Francis Lindsey
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Rotary piston and cylinder device
    • Patent number 10,961,849
    • Issue date Mar 30, 2021
    • LONTRA LIMITED
    • Stephen Francis Lindsey
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Rotary piston and cylinder devices
    • Patent number 10,662,775
    • Issue date May 26, 2020
    • LONTRA LIMITED
    • Stephen Francis Lindsey
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Rotary piston and cylinder device
    • Patent number 10,400,601
    • Issue date Sep 3, 2019
    • LONTRA LIMITED
    • Stephen Francis Lindsey
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Rotary piston and cylinder devices
    • Patent number 9,057,268
    • Issue date Jun 16, 2015
    • Lontra Limited
    • Stephen Francis Lindsey
    • F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...

Patents Applicationslast 30 patents

  • Information Patent Application

    CHECK VALVE
    • Publication number 20220186851
    • Publication date Jun 16, 2022
    • LONTRA LIMITED
    • Stephen Francis LINDSEY
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    ROTARY PISTON AND CYLINDER DEVICE
    • Publication number 20190242258
    • Publication date Aug 8, 2019
    • LONTRA LIMITED
    • Stephen Francis LINDSEY
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    ROTARY PISTON AND CYLINDER DEVICE
    • Publication number 20190234215
    • Publication date Aug 1, 2019
    • LONTRA LIMITED
    • Stephen Francis LINDSEY
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    ROTARY PISTON AND CYLINDER DEVICE
    • Publication number 20190218911
    • Publication date Jul 18, 2019
    • LONTRA LIMITED
    • Stephen Francis LINDSEY
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    ROTARY PISTON AND CYLINDER DEVICE
    • Publication number 20190195071
    • Publication date Jun 27, 2019
    • LONTRA LIMITED
    • Stephen Francis Lindsey
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    ROTARY PISTON AND CYLINDER DEVICES
    • Publication number 20170211389
    • Publication date Jul 27, 2017
    • LONTRA LIMITED
    • Stephen Francis Lindsey
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    ROTARY PISTON AND CYLINDER DEVICE
    • Publication number 20170211387
    • Publication date Jul 27, 2017
    • LONTRA LIMITED
    • Stephen Francis Lindsey
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Application

    ROTARY PISTON AND CYLINDER DEVICE
    • Publication number 20170211388
    • Publication date Jul 27, 2017
    • LONTRA LIMITED
    • Stephen Francis Lindsey
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Application

    ROTARY PISTON AND CYLINDER DEVICES
    • Publication number 20170204727
    • Publication date Jul 20, 2017
    • LONTRA LIMITED
    • Stephen Francis Lindsey
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    ROTARY PISTON AND CYLINDER DEVICES
    • Publication number 20110174095
    • Publication date Jul 21, 2011
    • Stephen F. Lindsey
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES