Merger

Recorded: 2010-08-12 Pages: 10

Assignor

CENTURY OILFIELD SERVICES, INC.

Executed: 2010-01-01

Assignee

CALFRAC WELL SERVICES LTD.

855 - 2ND STREET SW, SUITE 4500, CALGARY, T2P 4K7, CANADA

Covered Property (1)

Shock-Release Fluid Fracturing Method and Apparatus

Patent: 7,810,570 →

Application: 11/552,889 →

Publication: US 2007/0295508

Related Assignments (1)

Other recorded transfers of the patent in this record — the chain of ownership.