Patent Assignment
Reel/Frame 013662/0211
Assignment of Assignor's Interest
Recorded: 2003-01-10
Pages: 10
Assignors
RAVENSBERGEN, JOHN EDWARD
Executed: 2003-01-08
MISSELBROOK, JOHN GORDON
Executed: 2003-01-08
PORTMAN, LANCE NIGEL
Executed: 2002-11-13
Assignee
BJ SERVICES COMPANY
5500 NORTHWEST CENTRAL DRIVE, HOUSTON, TEXAS, 77092
Covered Property
(1)
Method for Cleaning Gravel Packs
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.