Patent Assignment
Reel/Frame 020491/0582
Assignment of Assignor's Interest
Recorded: 2008-02-11
Pages: 5
Assignor
CELANESE HOLDING GMBH
Executed: 2008-01-15
Assignee
BASF FUEL CELL GMBH
INDUSTRIEPARK HOCHST, FRANKFURT AM MAIN, D-65926, GERMANY
Covered Properties
(4)
Proton-Conducting Polymer Membrane Comprising a Polymer with Sulphonic Acid Groups and Use Thereof in Fuel Cells
Polymer Film Based on Polyazoles, and Uses Thereof
Proton-Conducting Polymer Membrane Comprising Sulfonic Acid-Containing Polyazoles, and Use Thereof in Fuel Cells
Proton Conducting Polymer Membrane Comprising Phosphonic Acid Groups Containing Polyazoles and the Use Thereof in Fuel Cells
Related Assignments
(5)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignor's Interest
Mar 23, 2005
From: KIEFER, JOACHIM; UENSAL, OEMER; CALUNDANN, GORDON
To: CELANESE VENTURES GMBH
Reel/Frame 015954/0608 →
Assignment of Assignor's Interest
May 24, 2005
From: KIEFER, JOACHIM; CALUNDANN, GORDON; UENSAL, OEMER; BAURMEISTER, JOCHEN
To: CELANESE VENTURES GMBH
Reel/Frame 016272/0984 →
Assignment of Assignor's Interest
Aug 24, 2005
From: UENSAL, OEMER; KIEFER, JOACHIM; CALUNDANN, GORDON; SANSONE, MICHAEL
To: CELANESE VENTURES GMBH
Reel/Frame 016909/0506 →
Assignment of Assignor's Interest
Apr 12, 2006
From: UENSAL, OEMER; KIEFER, JOACHIM; CALUNDANN, GORDON; SANSONE, MICHAEL
To: CELANESE VENTURES GMBH
Reel/Frame 017471/0485 →
Merger
Dec 31, 2007
From: CELANESE VENTURES GMBH
To: CELANESE HOLDING GMBH
Reel/Frame 020312/0907 →