Assignment of Assignor's Interest

Recorded: 2010-08-18 Pages: 5

Assignors

ZHANG, KEWEI

Executed: 2010-02-16

O'NEIL, BILL

Executed: 2010-02-16

MALEY, DARREN

Executed: 2010-02-16

Assignee

TRICAN WELL SERVICES LTD.

C/O 645-7TH AVENUE S.W., SUITE 2900, CALGARY, ALBERTA, T2P 4G8, CANADA

Covered Property (1)

Hydrocarbon Fluid Compositions and Methods for Using Same

Patent: 7,977,285 →

Application: 12/613,350 →

Publication: US 2010/0113308

Related Assignments (2)

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