Patent Assignment
Reel/Frame 036794/0538
Assignment of Assignor's Interest
Recorded: 2015-10-14
Pages: 6
Assignors
ZHOU, CHUN
Executed: 2015-10-14
LIU, FUCHEN
Executed: 2015-10-14
YANG, ZHENZHOU
Executed: 2015-10-14
Assignee
CNPC USA CORP.
2901 WILCREST DRIVE, SIXTH FLOOR, HOUSTON, TEXAS, 77042
Covered Property
(1)
High Density and High Temperature Emulsifier for Use in an Oil Based Drilling Fluid System