Patent Assignment
Reel/Frame 007420/0210
Assignment of Assignor's Interest
Recorded: 1995-03-13
Pages: 5
Assignor
R & F INDUSTRIES, INC.
Executed: 1995-03-07
Assignee
M-I DRILLING FLUIDS L.L.C.
3 GREENWAY PLAZA, HOUSTON, TEXAS 77046
Covered Property
(1)
Well Drilling Process and Clay Stabilizing Agent
Patent:
5,558,171 →
Application:
08/232,386 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Apr 25, 1994
From: MCGLOTHLIN, RAYMOND E.; WOODWORTH, FRANK B.
To: R&F INDUSTRIES, INC.
Reel/Frame 006977/0322 →
Change of Name
Aug 14, 1998
From: M-I DRILLING FLUIDS L.L.C., A DELAWARE LIMITED LIABILITY COMPANY
To: M-I L.L.C., A DELAWARE LIMITED LIABILITY COMPANY
Reel/Frame 009375/0719 →
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 →