Learn more

LI YASHAN

Overview
  • Total Patents
    19
  • GoodIP Patent Rank
    88,029
  • Filing trend
    ⇩ 27.0%
About

LI YASHAN has a total of 19 patent applications. It decreased the IP activity by 27.0%. Its first patent ever was published in 2017. It filed its patents most often in China. Its main competitors in its focus markets organic fine chemistry, environmental technology and materials and metallurgy are LI BOQIANG, Linhai liansheng chemical co ltd and ZHEJIANG APELOA PHARMACEUTICAL SCIENCE & TECHNOLOGY CO LTD.

Patent filings in countries

World map showing LI YASHANs patent filings in countries
# Country Total Patents
#1 China 19

Patent filings per year

Chart showing LI YASHANs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Li Yashan 19

Latest patents

Publication Filing date Title
CN108299228A The preparation method of adipic dihydrazide
CN108148043A A kind of synthetic method of 2- thenoyls hydrazine
CN108285433A A method of synthesis maleic acid hydrazide
CN108299229A A kind of preparation method of 3,4,5- trimethoxybenzoyls hydrazine
CN108299230A The synthetic method of salicylyl hydrazine
CN108191705A A kind of method for preparing acethydrazide
CN108250099A A kind of preparation method of nardil
CN108191702A A kind of synthetic method of tertiary butyl hydrazine
CN107963979A A kind of synthetic method of phenylhydrazine
CN108191696A A kind of method for preparing isopropyl hydrazine
CN107353224A A kind of method for preparing nardil
CN107056646A A kind of synthetic method of adipic dihydrazide
CN106928088A A kind of synthetic method of o-chlorobenzoyl hydrazine
CN106866457A A kind of synthetic method to chlorophenyl hydrazine
CN106748878A A kind of synthetic method of butanone azine
CN106865513A A kind of preparation method of hydrazine hydrate
CN106831517A A kind of synthetic method of thiocarbohydrazide
CN106831483A A kind of preparation method of phenylhydrazine
CN106674059A Synthesis method of carbohydrazide