Patent Assignment
Reel/Frame 006454/0578
Assignment of Assignors Interest.
Recorded: 1993-02-24
Pages: 2
Assignors
YANG, DAZHONG
Executed: 1993-02-10
MAIER, GERHARD
Executed: 1993-02-10
NUYKEN, OSKAR
Executed: 1993-02-10
BREKNER, MICHAEL-JOACHIM
Executed: 1993-02-10
HELMER-METZMANN, FREDDY
Executed: 1993-02-10
Assignee
HOECHST AKTIENGESELLSCHAFT
6230 FRANKFURT AM MAIN 80, GERMANY
Covered Property
(1)
Polyether Ketones and Polyether Sulfones Based on Phenylindane, and the Use Thereof for Optical Systems
Patent:
5,373,081 →
Application:
08/021,894 →
Related Assignments
(5)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Sep 24, 2001
From: HOECHST AKTIENGESELLSCHAFT
To: TICONA GMBH
Reel/Frame 012188/0305 →
Assignment of Assignor's Interest
Feb 7, 2006
From: TICONA GMBH
To: DEGUSSA AG
Reel/Frame 017125/0552 →
Change Address
Feb 22, 2010
From: EVONIK DEGUSSA GMBH
To: EVONIK DEGUSSA GMBH
Reel/Frame 023985/0296 →
Change of Entity
Feb 22, 2010
From: DEGUSSA AG
To: DEGUSSA GMBH
Reel/Frame 023998/0937 →
Change of Name
Feb 23, 2010
From: DEGUSSA GMBH
To: EVONIK DEGUSSA GMBH
Reel/Frame 024006/0127 →