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WEIHUI CHEMICAL CO LTD

Overview
  • Total Patents
    29
  • GoodIP Patent Rank
    69,863
  • Filing trend
    ⇩ 50.0%
About

WEIHUI CHEMICAL CO LTD has a total of 29 patent applications. It decreased the IP activity by 50.0%. Its first patent ever was published in 2010. It filed its patents most often in China. Its main competitors in its focus markets basic materials chemistry, materials and metallurgy and macromolecular chemistry and polymers are KY OTDEL BURENIYA ISPYTAN, CHINA UNITED COALBED METHANE NAT ENG RES CT CO LTD and KITAI ADRIAN H.

Patent filings in countries

World map showing WEIHUI CHEMICAL CO LTDs patent filings in countries
# Country Total Patents
#1 China 29

Patent filings per year

Chart showing WEIHUI CHEMICAL CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Lu Jiahan 15
#2 Liang Yanli 15
#3 Jin Jianzhong 13
#4 Li Xinfen 11
#5 Wang Aimin 10
#6 Zhao Yuanwei 8
#7 Geng Qiang 7
#8 Li Linfeng 7
#9 Zhao Juntao 7
#10 Guo Juan 6

Latest patents

Publication Filing date Title
CN111233363A Low-density reinforcing agent for oil well cement and preparation method thereof
CN110746949A Oil well cement polymer fluid loss agent and preparation method thereof
CN110092868A A kind of oil-well cement suspension type polymerization object retarder and preparation method and oil-well cement slurry system
CN109896801A A kind of NEW TYPE OF COMPOSITE lightening material low weight cement slurry and preparation method thereof
CN108587579A Drilling fluid mud cake hardens reinforcing agent
CN107987819A One kind well cementation less toxic, low bubble oil-base mud irrigation and preparation method thereof
CN108046694A A kind of channeling control cement slurry system cemented the well suitable for shale gas and preparation method thereof
CN106632917A Preparation method of polymer fluid loss agent for sulphoaluminate cement
CN106701051A Oil base mud flushing agent for well cementation and method for preparing flushing solution
CN107846741A A kind of microwave dryer magnetron heat sink
CN107845965A Transformer electricity cabinet is evacuated heat sink
CN107837630A A kind of Water-fog dusting apparatus of solid oil-well cement drag reducer
CN107840078A A kind of conveyer belt automatic deviation rectifying device
CN105237679A Preparation method of oil well cement emulsion polymer fluid loss agent
CN105601853A Drag reducer for oil well cement, and preparation method thereof
CN105385427A Ocean deep water surface layer cementing cement paste system and preparing method thereof
CN105419757A Preparation method of silicon-based drilling fluid flushing agent and silicon-based slurry flushing method
CN105083956A Conveying device for oil well cement fluid loss agent
CN104815740A Drying, crushing and conveying device for fluid loss additive of oil well cement
CN104371065A Preparation method of instant polymer retarder for oil well cement