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HUNAN KEYUAN BIO PRODUCTS CO LTD

Overview
  • Total Patents
    35
About

HUNAN KEYUAN BIO PRODUCTS CO LTD has a total of 35 patent applications. Its first patent ever was published in 2008. It filed its patents most often in China. Its main competitors in its focus markets organic fine chemistry and chemical engineering are TAICANG QIANJING CHEMICAL CO LTD, BLASCHIM SPA and LUI NORBERT.

Patent filings in countries

World map showing HUNAN KEYUAN BIO PRODUCTS CO LTDs patent filings in countries
# Country Total Patents
#1 China 35

Patent filings per year

Chart showing HUNAN KEYUAN BIO PRODUCTS CO LTDs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Liu Zhiqiang 27
#2 Lin Wenbin 10
#3 Li Wei 8
#4 Yang Changyong 5
#5 Dong Shixiang 4
#6 Tao Shuai 3
#7 Cai Chunlin 2
#8 Liu Shanlin 2

Latest patents

Publication Filing date Title
CN103695478A Method for converting polydatin to resveratrol
CN103627736A Method for extracting resveratrol in polygonum cuspidatum fermentation liquor
CN103819326A Method for separating and purifying coenzyme Q10 from microorganism
CN103820506A Method for producing coenzyme Q10 by fermenting genetic recombinant bacteria
CN103664739A Telaprevir intermediate preparation method
CN103664982A Arteannuin analogs and preparation method thereof
CN103664941A Preparation method of vinpocetine analogue
CN103664934A Preparation method for vinpocetine
CN103664537A Preparation method for resveratrol
CN103709221A Preparation method for cordycepin
CN103739610A Method and equipment for preparing artemisinin by adopting dihydroarteannuic acid as raw material
CN103848879A Method for preparing progesterone by taking 1,4-androstenedione as raw material
CN103785339A Photosensitized oxidation reaction equipment and application thereof
CN103739476A Dihydroarteannuic acid preparation method
CN103739608A Method for preparing artemisinin by using residue obtained through extraction of artemisinin from sweet wormwood herb
CN103739477A Dihydroarteannuic acid synthesis process
CN103739609A Method and equipment for scale production of artemisinin
CN103755550A Synthetic method for dihydroartemisinin
CN103788110A Method for preparing artemisinin by using arteannuic acid as raw material
CN103570787A Method for separating beta-sitosterol and stigmasterol from mixed phytosterol