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Kefei CAO

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  • Beijing, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Fuming furnace with lead collecting and discharging function
    • Patent number 10,443,112
    • Issue date Oct 15, 2019
    • CHINA ENFI ENGINEERING CORPORATION
    • Dawei Cui
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Refractory protection layer for metallurgical furnace
    • Patent number 10,415,883
    • Issue date Sep 17, 2019
    • CHINA ENFI ENGINEERING CORPORATION
    • Budong Zheng
    • F27 - FURNACES KILNS OVENS RETORTS
  • Information Patent Grant

    Lance
    • Patent number 10,113,800
    • Issue date Oct 30, 2018
    • CHINA ENFI ENGINEERING CORPORATION
    • Dong Li
    • F27 - FURNACES KILNS OVENS RETORTS

Patents Applicationslast 30 patents

  • Information Patent Application

    REFRACTORY PROTECTION LAYER FOR METALLURGICAL FURNACE
    • Publication number 20180172350
    • Publication date Jun 21, 2018
    • CHINA ENFI ENGINEERING CORPORATION
    • Budong ZHENG
    • F27 - FURNACES KILNS OVENS RETORTS
  • Information Patent Application

    LANCE
    • Publication number 20180094857
    • Publication date Apr 5, 2018
    • CHINA ENFI ENGINEERING CORPORATION
    • Dong Li
    • F27 - FURNACES KILNS OVENS RETORTS
  • Information Patent Application

    FUMING FURNACE WITH LEAD COLLECTING AND DISCHARGING FUNCTION
    • Publication number 20170283907
    • Publication date Oct 5, 2017
    • CHINA ENFI ENGINEERING CORPORATION
    • Dawei CUI
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...