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CHINA NAT OFFSHORE OIL CORP CH

Overview
  • Total Patents
    12
About

CHINA NAT OFFSHORE OIL CORP CH has a total of 12 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 materials and metallurgy are FEDOROV KONSTANTIN N, VONTECH INT CORP and KT I MIN STR V YUZHN RAJONAKH.

Patent filings in countries

World map showing CHINA NAT OFFSHORE OIL CORP CHs patent filings in countries
# Country Total Patents
#1 China 12

Patent filings per year

Chart showing CHINA NAT OFFSHORE OIL CORP CHs patent filings per year from 1900 to 2020

Focus industries

Focus technologies

# Technology
#1 Building materials

Top inventors

# Name Total Patents
#1 Rui Zhang 2
#2 Hongwei Hou 2
#3 Caihui Qin 2
#4 Jian Li 2
#5 Biao Sun 2
#6 Chuanhong Jin 2
#7 Xianglin Zhang 2
#8 Kai Xu 1
#9 Junhua Hu 1
#10 Yanjun Liu 1

Latest patents

Publication Filing date Title
CN101659634A Synthetic method of anion sulfoacid gemini surfactant DTM
CN101261196A A kind of high-temperature high pressure environment tensile load test method
CN101100361A Low-temperature low-density well cementing cement mortar
CN101130947A Construction is subjected to the die block cradle supporting method of the concrete work of tidewater restriction
CN101130980A A kind of method of removing the bored pile construction obstacle
CN101104739A A kind of rubber powder modified asphalt and working method thereof
CN101074603A Simulation radially exist the experimental facilities of electric conductivity difference environment and logger radially depth sounding measure system
CN101054897A Axial resolution determinator and mensuration system
CN101050695A A kind of system that reclaims the barite in the weighted drilling fluid and get rid of useless solid phase
CN1975100A Oil well intelligent anti-polluting device
CN1847366A Method of eliminating naphthenic acid from crude oil or fraction oil
CN1743640A Oil well electric pump separate-extraction intelligent joint