Patent Assignment
Reel/Frame 006666/0372
Assignment of Assignor's Interest
Recorded: 1993-08-09
Pages: 5
Assignors
HELMER-METZMANN, FREDDY
Executed: 1993-07-19
OSAN, FRANK
Executed: 1993-07-19
SCHNELLER, ARNOLD
Executed: 1993-07-19
RITTER, HELMUT
Executed: 1993-07-14
LEDJEFF, KONSTANTIN
Executed: 1993-07-05
NOLTE, ROLAND
Executed: 1993-07-05
THORWIRTH, RALF
Executed: 1993-07-14
Assignee
HOECHST AKTIENGESELLSCHAFT
ZENTRALE PATENTABTEILUNG, GEBAUDE F 821 FEDERAL REPUBLIC OF GERMANY, GERMANY
Covered Property
(1)
Polymer Electrolyte Membrane, and Process for the Production Thereof
Patent:
5,438,082 →
Application:
08/075,219 →
Related Assignments
(6)
Other recorded transfers of the patent in this record — the chain of ownership.
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 14, 2005
From: CLEANESE VENTURES GMBH
To: PEMEAS GMBH
Reel/Frame 017230/0181 →
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: AVENTIS PHARMA DEUTSCHLAND
To: CELANESE VENTURES GMBH
Reel/Frame 017275/0116 →
Assignment of Assignor's Interest
Nov 19, 2005
From: CELANESE VENTURES GMBH
To: PEMEAS GMBH
Reel/Frame 017325/0323 →