Patent Assignment
Reel/Frame 004277/0686
Assignment of Assignors Interest.
Recorded: 1984-07-06
Pages: 1
Assignor
LESTON, GERD
Executed: 1983-03-11
Assignee
KOPPERS COMPANY, INC.
KOPPERS BUILDING, A CORP OF DE, PITTSBURGH, PENNSYLVANIA, 15219
Covered Property
(1)
Process for Alkylating Phenolic Compounds to Produce Ortho- or Para- Monoalkylated Phenols or 2,4- or 2,6-Dialkylated Phenols
Patent:
4,475,001 →
Application:
06/476,060 →
Related Assignments
(3)
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 →
Assignment of Assignor's Interest
Feb 17, 1994
From: MELLON BANK, N.A.
To: KOPPERS INDUSTRIES, INC.
Reel/Frame 006875/0231 →