Patent Assignment
Reel/Frame 003920/0017
Assignment of Assignors Interest.
Recorded: 1981-09-09
Pages: 1
Assignee
KOPPERS COMPANY
KOPPERS BLDG., A CORP. OF DE, PITTSBURGH, PENNSYLVANIA
Covered Property
(1)
Vanadium-Hydrogen-Phosphorus-Oxygen Catalytic Material
Patent:
4,374,756 →
Application:
06/300,710 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest.
Feb 16, 1989
From: KOPPERS COMPANY, INC.
To: KOPPERS INDUSTRIES, INC., A CORP. OF PA
Reel/Frame 005126/0140 →
Security Interest
Feb 27, 1989
From: KOPPERS INDUSTRIES, INC.
To: KOPPERS AND MELLON BANK, N.A.
Reel/Frame 005026/0517 →
License
May 24, 1989
From: KOPPERS INDUSTRIES
To: HARJU, PHILIP H.
Reel/Frame 005077/0878 →
Assignment of Assignor's Interest
Feb 17, 1994
From: MELLON BANK, N.A.
To: KOPPERS INDUSTRIES, INC.
Reel/Frame 006875/0231 →