Assignment of Assignor's Interest

Recorded: 2003-04-24 Pages: 5

Assignor

VIJN, JAN PIETER

Executed: 2002-02-19

Assignee

HILLBUTON ENERGY SERVICES, INC.

10200 BELLAIRE BOULEVARD, HOUSTON, TEXAS, 77072

Covered Property (1)

Cementing Subterranean Zones Using Cement Compositions Containing Biodegradable Dispersants

Application: 10/170,399 →

Publication: US 2003/0230407

Related Assignments (1)

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