Patent Assignment
Reel/Frame 005911/0636
Assignment of Assignors Interest.
Recorded: 1991-10-28
Pages: 2
Assignee
M-I DRILLING FLUIDS COMPANY A TX GENERAL PARTNERSHIP
5950 NORTH COURSE, HOUSTON, TX 77072
Covered Property
(1)
Drilling Fluid Additive and Method for Inhibiting Hydration
Patent:
5,149,690 →
Application:
07/783,368 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Merger
Apr 24, 1998
From: M-I DRILLING FLUIDS COMPANY, A TEXAS GENERAL PARTNERSHIP
To: M-I L.L.C., A DELAWARE LIMITED LIABILITY COMPANY
Reel/Frame 009227/0129 →
Assignment of Assignor's Interest
Oct 26, 2010
From: M-I HOLDINGS L.L.C.
To: M-I L.L.C.
Reel/Frame 025192/0491 →
Change of Name
Oct 26, 2010
From: M-I L.L.C.
To: M-I HOLDINGS L.L.C.
Reel/Frame 025192/0511 →