Patent Assignment
Reel/Frame 006235/0115
Assignment of Assignors Interest.
Recorded: 1992-08-06
Pages: 2
Assignor
STIPANOVICH, JOHN, JR.
Executed: 1992-08-04
Covered Property
(1)
Process for Making Carbon Electrode Impregnating Pitch from Coal Tar
Patent:
5,326,457 →
Application:
07/925,160 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Security Agreement
Jan 14, 1998
From: KOPPERS INDUSTRIES, INC.
To: MELLON BANK, N.A.
Reel/Frame 008869/0926 →
Assignment of Assignor's Interest
Mar 5, 2002
From: ARISTECH CHEMICAL CORPORATION
To: SUNOCO, INC. (R&M)
Reel/Frame 012665/0008 →
Assignment of Assignor's Interest
Jul 22, 2002
From: ARISTECH CHEMICAL CORPORATION
To: KOPPERS INDUSTRIES, INC.
Reel/Frame 013110/0660 →