Patent Assignment
Reel/Frame 022509/0801
Assignment of Assignor's Interest
Recorded: 2009-04-06
Pages: 3
Assignor
ZHANG, YING
Executed: 2009-04-02
Assignee
HALLIBURTON ENERGY SERVICES, INC.
10200 BELLAIRE BOULEVARD, HOUSTON, TEXAS, 77072
Covered Property
(1)
High Performance Drilling Fluids with Submicron-Size Particles as the Weighting Agent