TREA

Liwen Wei

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  • Bellaire, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    High performance rock bit grease
    • Patent number 8,789,623
    • Issue date Jul 29, 2014
    • Halliburton Energy Services, Inc.
    • David P. Duckworth
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...

Patents Applicationslast 30 patents

  • Information Patent Application

    novel lignin based composition
    • Publication number 20130338049
    • Publication date Dec 19, 2013
    • James King
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Application

    High Performance Rock Bit Grease
    • Publication number 20130220704
    • Publication date Aug 29, 2013
    • David P. Duckworth
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Application

    HIGH PERFORMANCE ROCK BIT GREASE
    • Publication number 20110048809
    • Publication date Mar 3, 2011
    • David P. Duckworth
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...