Patent Assignment
Reel/Frame 012088/0272
Assignment of Assignor's Interest
Recorded: 2001-08-16
Pages: 2
Assignor
YAMAMOTO, TETSU
Executed: 2001-07-27
Assignee
CELANESE VENTURES GMBH
65926 FRANKFURT, GERMANY
Covered Property
(1)
Method for Producing Bridged Polymer Membrane and Fuel Cell
Patent:
6,790,553 →
Application:
09/889,971 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Sep 6, 2001
From: YAMAMOTO, TETSU
To: CELANESE VENTURES GMBH
Reel/Frame 012196/0321 →
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: CLEANESE VENTURES GMBH
To: PEMEAS GMBH
Reel/Frame 017230/0181 →
Assignment of Assignor's Interest
Nov 19, 2005
From: CELANESE VENTURES GMBH
To: PEMEAS GMBH
Reel/Frame 017325/0323 →