Patent Assignment
Reel/Frame 005819/0828
Assignment of Assignors Interest.
Recorded: 1991-08-16
Pages: 3
Assignors
CHRIST, ULRICH
Executed: 1991-08-05
KUNST, HELMUT
Executed: 1991-08-08
WAHL, GEORG
Executed: 1991-08-08
Assignee
DEGUSSA AKTIENGESELLSCHAFT A GERMAN CORPORATION
WEISSFRAUENSTRASSE 9 6000 FRANKFURT AM MAIN 1, GERMANY
Covered Property
(1)
Method of Improving the Corrosion Resistance of Carbonitrided Components Made of Ferrous Materials
Patent:
5,288,340 →
Application:
07/746,427 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Jun 20, 1995
From: DEGUSSA AKTIENGESELLSCHAFT
To: DURFERRIT GMBH THERMOTECHNIK
Reel/Frame 007505/0870 →
Assignment of Assignor's Interest
May 20, 1999
From: DUFERRIT GMBH THERMOTECHNIK
To: HOUGHTON DURFERRIT GMBH
Reel/Frame 009958/0510 →
Assignment of Assignor's Interest
Nov 4, 1999
From: DURFERRIT GMBH THERMOTECHNIK
To: HOUGHTON DURFERRIT GMBH
Reel/Frame 010351/0748 →