Assignment of Assignor's Interest

Recorded: 2007-06-22 Pages: 3

Assignor

HRE LTD.

Executed: 2006-12-19

Assignee

CANADIAN ENERGY SERVICES L.P.

311 - 6TH AVENUE S.W., SUITE 300 ENERGY PLAZA, CALGARY, ALBERTA T2P 3HZ, CANADA

Covered Property (1)

Drilling Fluid and Method for Reducing Lost Circulation

Patent: 7,705,099 →

Application: 11/729,775 →

Publication: US 2007/0244013

Related Assignments (2)

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