Inventor
ZHOU CHUN
US11 patents
⚠️ This page may combine multiple inventors who share the name “ZHOU CHUN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CNPC USA CORP
6 patentsUS10829680B2Nov 10, 2020
High density and high temperature emulsifier for use in an oil based drilling fluid system
CNPC USA CORP1 citations61
US10723931B2Jul 28, 2020
Thinner for oil-based drilling fluids
CNPC USA CORP1 citations60
US10723929B2Jul 28, 2020
Thinner for oil-based drilling fluids
CNPC USA CORP0 citations50
US10280357B2May 7, 2019
High density and high temperature emulsifier for use in an oil based drilling fluid system
CNPC USA CORP0 citations50
US9909050B2Mar 6, 2018
High density and high temperature emulsifier for use in an oil based drilling fluid system
CNPC USA CORP1 citations50
US10787602B2Sep 29, 2020
Shale inhibitors used in the water-based fluid for shale formation
CNPC USA CORP0 citations42
XIAMEN SINOPEG BIOTECH CO LTD
3 patentsUS10434182B2Oct 8, 2019
Eight-arm polyethylene glycol derivative, production method therefor, and modified bio-related substance thereof
XIAMEN SINOPEG BIOTECH CO LTD16 citations87
US10660969B2May 26, 2020
Eight-arm polyethylene glycol derivative, production method therefor, and modified bio-related substance thereof
XIAMEN SINOPEG BIOTECH CO LTD3 citations66
US11324827B2May 10, 2022
Multifunctionalized polyethylene glycol derivative and preparation method therefor
XIAMEN SINOPEG BIOTECH CO LTD0 citations42