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BEIJING CHARNA CHEMICALS LTD

Overview
  • Total Patents
    13
About

BEIJING CHARNA CHEMICALS LTD has a total of 13 patent applications. Its first patent ever was published in 2005. It filed its patents most often in China. Its main competitors in its focus markets environmental technology are ZHANGJIAGANG SHUANGLIN INK CO LTD, SUZHOU HONGMAO TEXTILE CO LTD and KUZNETSK VOS NI UGLEKHIM.

Patent filings in countries

World map showing BEIJING CHARNA CHEMICALS LTDs patent filings in countries
# Country Total Patents
#1 China 13

Patent filings per year

Chart showing BEIJING CHARNA CHEMICALS LTDs patent filings per year from 1900 to 2020

Focus industries

Focus technologies

Top inventors

# Name Total Patents
#1 Mingjian Qiu 13
#2 Yali Zhang 13
#3 Zhaohui Chen 7
#4 Jia Yao 6
#5 Chaohui Chen 6
#6 Chunshan Zhang 6
#7 Wei Zhang 5
#8 Haibin Li 4
#9 Heping Zhang 4
#10 Yuntang Zhang 2

Latest patents

Publication Filing date Title
CN101456944A Refining method of high purity epoxy resins
CN101456970A Non-toxic fatty acid ester plasticiser mixture for polyvinyl chloride resin
CN101456831A Method for preparing 2,5-disulfonic benzaldehyde
CN101397065A Liquid outlet design without air back
CN101372483A Method for synthesizing substituted benzo (1,4) dioxane derivative
CN101372640A Method for adding coal catalyst and additive
CN101343216A Method for preparing insecticide ethofenprox
CN101318920A Method for preparing para orientation o-aminophenyl-thioether via midbody para orientation o-nitrobenzene-sulfhydrate
CN101492378A Improvement for production process for isopropyl aniline
CN101311180A Purification method for cephalosporin
CN101440057A Chloridization method for nitrogen heterocyclic butanone isobutene derivatives
CN1827569A Process for preparing 1,2-di alkoxy-3-fluorobenzene from intermediate 2-fluoro-6-halogeno phenol
CN1827593A Process for preparing polyisocyanate by solid phosgene