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WEI LIWEN

Overview
  • Total Patents
    12
About

WEI LIWEN has a total of 12 patent applications. Its first patent ever was published in 1991. It filed its patents most often in China and United States. Its main competitors in its focus markets basic materials chemistry and environmental technology are EMG LUBRICANTS GK, NANOL TECHNOLOGIES OY AB and ANSHAN HAIHUA OIL GREASE CHEMICAL CO LTD.

Patent filings in countries

World map showing WEI LIWENs patent filings in countries
# Country Total Patents
#1 China 9
#2 United States 3

Patent filings per year

Chart showing WEI LIWENs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Wei Liwen 10
#2 Beckler Phil 3
#3 Liwen Wei 2
#4 Chen Mingjie 1

Latest patents

Publication Filing date Title
US2008083900A1 Synthetic refrigeration oil composition for HFC applications
CN1833504A Prepn. process for high efficiency high stable pyrethrum emulsion
CN1695448A Cream with no benzene-azadirachtin and preparation method thereof
CN1594500A Soil-saving reinforced material for road base
CN1570125A High purity soy bean isoflavone process using supercritical CO#-[2] extraction
CN1566308A Antimicrobial agent for washing powder
CN1493545A New type high strength antileakage concrete building block
CN1156172A Self-cleaning agent for oil pipe of IC engine
CN1063273A Colorful quartz sands and surperficial colored glaze technology thereof
CN1064496A Technique for making powdered waterproof and heat-insulating material