Patent Assignment
Reel/Frame 004220/0382
Assignment of Assignors Interest.
Recorded: 1984-02-10
Pages: 1
Assignor
LESTON, GERD
Executed: 1982-09-29
Assignee
KOPPER COMPANY, INC.
KOPPER BUILDING, A CORP OF DE, PITTSBURGH, PENNSYLVANIA, 15219
Covered Property
(1)
Process for Separating Nitrated Phenolic Compounds from Other Phenolic Compounds
Patent:
4,447,654 →
Application:
06/431,640 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest.
Jan 23, 1989
From: KOPPERS COMPANY, INC.,
To: ISC ACQUISITION COMPANY, A CORP. OF DE.
Reel/Frame 005009/0188 →
Change of Name January 17, 1989, Delaware
Jul 31, 1989
From: ISC ACQUISITION COMPANY
To: INDSPEC CHEMICAL CORPORATION
Reel/Frame 005138/0231 →
Change of Name
Sep 25, 1989
From: ISC ACQUISITION COMPANY
To: INDSPEC CHEMICAL CORPORATION
Reel/Frame 005142/0420 →