Patent Assignment
Reel/Frame 006977/0322
Assignment of Assignor's Interest
Recorded: 1994-04-25
Pages: 3
Assignee
R&F INDUSTRIES, INC.
3001 KATY BROOKSHIRE ROAD, KATY, TEXAS, 77494
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
Mar 13, 1995
From: R & F INDUSTRIES, INC.
To: M-I DRILLING FLUIDS L.L.C.
Reel/Frame 007420/0210 →
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 →