Patent Assignment
Reel/Frame 004923/0656
Assignment of Assignors Interest.
Recorded: 1988-05-17
Pages: 3
Assignors
CAMPBELL, ROY E.
Executed: 1988-05-14
WILKINSON, JOHN D.
Executed: 1988-05-14
HUDSON, HANK M.
Executed: 1988-05-14
Assignee
ELCOR CORPORATION, A CORP OF TX.
MIDLAND, TEXAS
Covered Property
(1)
Hydrocarbon Gas Processing
Patent:
4,869,740 →
Application:
07/194,822 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Change of Name
Dec 2, 2002
From: ELCOR CORPORATION
To: ELKCORP
Reel/Frame 013542/0525 →
Assignment of Assignor's Interest
Nov 1, 2005
From: ELKCORP
To: ORTLOFF ENGINEERS, LTC
Reel/Frame 016712/0113 →
Corrective Assignment to Correct the Assignee Name and Address Previously Recorded on Reel 016712 Frame 0113. Assignor(S) Hereby Confirms the Assignment.
Feb 24, 2006
From: ELKCORP
To: TORGO LTD.
Reel/Frame 017215/0073 →
Change of Name
Apr 3, 2007
From: TORGO, LTD.
To: ORTLOFF ENGINEERS, LTD.
Reel/Frame 019193/0473 →