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YANTAI WANHUA POLYURETHANES CO

Overview
  • Total Patents
    75
About

YANTAI WANHUA POLYURETHANES CO has a total of 75 patent applications. Its first patent ever was published in 2008. It filed its patents most often in China, WIPO (World Intellectual Property Organization) and Republic of Korea. Its main competitors in its focus markets organic fine chemistry, chemical engineering and environmental technology are DRENT EIT, HYDROCARBON SYNTHESIS CORP and HERCOFINA.

Patent filings in countries

World map showing YANTAI WANHUA POLYURETHANES COs patent filings in countries

Patent filings per year

Chart showing YANTAI WANHUA POLYURETHANES COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Hua Weiqi 54
#2 Li Yuan 26
#3 Ding Jiansheng 20
#4 Zhao Wenjuan 13
#5 Weiqi Hua 12
#6 Song Jinhong 10
#7 Lou Yinchuan 9
#8 He Guangwen 8
#9 Shang Yonghua 8
#10 Chen Changsheng 7

Latest patents

Publication Filing date Title
CN103265438A Method for preparing diaminodicyclohexyl methane
CN103274899A Preparation method of trimethylolpropane
CN103254034A Trimethylolpropane preparation method
CN103232351A Preparation method of 2-amino-2-methyl-1-propyl alcohol
CN103145099A Method of hydrogen chloride oxidizing for preparation of chlorine with magnetically stabilized fluidized bed
CN103130656A Prepared method of 2-amino-2-methyl-1-propyl alcohol
CN103055897A Regeneration method of catalyst for producing chlorine by oxidizing hydrogen chloride
CN103071481A Fischer-Tropsch synthesis cobalt-based catalyst and preparation method thereof
CN103102469A High-strength and high-toughness polyurethane material, as well as preparation method and use thereof
CN102964583A Preparation method of bisphenol (polyphenol) solution in preparation of polycarbonate
CN102964566A Method for preparing polyisocyanate containing formimidoyl oxadiazine diketone
CN102942525A Method for preparing polyisocyanate containing uretidione group
CN102924286A Preparation method of N1-(2-aminoethyl)-1,2-ethylenediamine
CN102875400A Diethylenetriamine pentaacetic acid preparation method
CN102847499A Quench absorption tower and method for adopting quench absorption tower to absorb methacrolein and methacrylic acid
CN102872916A Composite catalyst, preparation method of composite catalyst and method of catalyzing butadiene trimerization reaction with composite catalyst
CN102757554A Halogen-containing aromatic polycarbonate polyol as well as preparation method and application thereof
CN102728370A Catalyst for preparing neopentyl glycol by hydrogenation and preparation method of catalyst
CN102718683A Method for preparing low-chromatic number isocyanate and isocyanate prepared by same
WO2013163799A1 Polyurethane modifier for pitch, pitch modified by same and use thereof