Patent Assignment
Reel/Frame 004222/0821
Assignment of Assignors Interest.
Recorded: 1984-02-17
Pages: 1
Assignor
LESTON, GERD
Executed: 1982-09-29
Assignee
KOPPERS COMPANY, INC.
KOPPERS BLDG., A CORP. OF DE, PITTSBURGH, PENNSYLVANIA, 15219,
Covered Property
(1)
Process for Separating 3,5-Xylenol or 3,4-Xylenol from Other Polymethylated Phenolic Compounds
Patent:
4,447,658 →
Application:
06/431,651 →
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 →