Patent Assignment
Reel/Frame 009534/0168
Assignment of Assignor's Interest
Recorded: 1998-11-24
Pages: 5
Assignor
HOECHST CELANESE CORPORATION
Executed: 1997-12-30
Assignee
HOECHST AKTIENGESELLSCHAFT
FRANKFURT AM MAIN, D-659, GERMANY
Covered Properties
(2)
Compositions of Aromatic Polybenzimidazoles and Aromatic Polyetherimides
Patent:
4,973,630 →
Application:
06/831,385 →
Compositions of Aromatic Polybenzimidazoles and Aromatic Polyimides
Patent:
4,973,629 →
Application:
06/831,389 →
Related Assignments
(8)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignors Interest.
Feb 12, 1990
From: JAFFE, MICHAEL
To: CELANESE CORPORATION, 10036, A CORP. OF DE.
Reel/Frame 005230/0829 →
Assignment of Assignors Interest.
Feb 12, 1990
From: JAFFE, MICHAEL
To: HOECHST CELANSE CORPORATION, A CORP. OF DE.
Reel/Frame 005230/0825 →
Assignment of Assignor's Interest
Nov 14, 2005
From: CLEANESE VENTURES GMBH
To: PEMEAS GMBH
Reel/Frame 017230/0181 →
Assignment of Assignor's Interest
Nov 14, 2005
From: HOECHST AG
To: AVENTIS PHARMA DEUTSCHLAND
Reel/Frame 017223/0694 →
Assignment of Assignor's Interest
Nov 14, 2005
From: AVENTIS PHARMA DEUTSCHLAND GMBH
To: CELANESE VENTURES GMBH
Reel/Frame 017223/0711 →
Assignment of Assignor's Interest
Nov 18, 2005
From: HOECHST AG
To: AVENTIS PHARMA DEUTSCHLAND
Reel/Frame 017240/0846 →
Assignment of Assignor's Interest
Nov 19, 2005
From: CELANESE VENTURES GMBH
To: PEMEAS GMBH
Reel/Frame 017325/0323 →
Assignment of Assignor's Interest
Nov 19, 2005
From: AVENTIS PHARMA DEUTSCHLAND
To: CELANESE VENTURES GMBH
Reel/Frame 017275/0116 →