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Yefen Wei

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  • Shanghai, CN
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Patents Grantslast 30 patents

Patents Applicationslast 30 patents

  • Information Patent Application

    Polyol Composition
    • Publication number 20250051507
    • Publication date Feb 13, 2025
    • COVESTRO DEUTSCHLAND AG
    • Yefen Wei
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Application

    RIGID POLYURETHANE FOAMS
    • Publication number 20210284817
    • Publication date Sep 16, 2021
    • Covestro Intellectual Property GmbH & Co. KG
    • Yefen Wei
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Application

    RIGID POLYURETHANE FOAM SYSTEM AND APPLICATION THEREOF
    • Publication number 20210032398
    • Publication date Feb 4, 2021
    • COVESTRO DEUTSCHLAND AG
    • Wenping Wei
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Application

    POLYURETHANE FOAM COMPOSITE PANEL
    • Publication number 20200362088
    • Publication date Nov 19, 2020
    • COVESTRO DEUTSCHLAND AG
    • Wenping Wei
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Application

    A POLYURETHANE FOAM AND A POLYURETHANE COMPOSITE COMPRISING THE SAME
    • Publication number 20190119430
    • Publication date Apr 25, 2019
    • COVESTRO DEUTSCHLAND AG
    • Wenping Wei
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...