Patent Assignment
Reel/Frame 004841/0939
Assignment of Assignors Interest.
Recorded: 1988-01-19
Pages: 3
Covered Property
(1)
Use of Polyalphalolefin in Downhole Drilling
Patent:
4,876,017 →
Application:
07/145,149 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Jul 16, 1998
From: COASTAL MUD INCORPORATED
To: COASTAL SUPERIOR SOLUTIONS, INC.
Reel/Frame 009314/0554 →
Assignment of Assignor's Interest
Jul 20, 1998
From: COASTAL SUPERIOR SOLUTIONS, INC.
To: SUN DRILLING PRODUCTS CORPORATION
Reel/Frame 009328/0411 →
Security Agreement
Dec 12, 2005
From: SUN DRILLING PRODUCTS CORPORATION
To: COMERICA BANK
Reel/Frame 016883/0001 →