Patent Assignment
Reel/Frame 005427/0788
Assignment of Assignors Interest.
Recorded: 1990-08-31
Pages: 2
Assignee
RINGSDORFF-WERKE GMBH
BONN, GERMANY
Covered Property
(1)
Graphite Tube Furnace with Specimen Support for Atomic Absorption Spectroscopy
Patent:
4,971,438 →
Application:
07/319,136 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Change of Name Effective on 06/24/1992
Apr 20, 1993
From: SIGRI GMBH
To: SIGRI GREAT LAKES CARBON GMBH
Reel/Frame 006504/0263 →
Merger
Dec 9, 1996
From: RINGSFORFF-WERKE GMBH
To: SGL CARBON AG
Reel/Frame 008251/0919 →
Change of Name
Dec 9, 1996
From: SIGRI GREAT LAKES CARBON GMBH
To: SGL CARBON AKTIENGESELLSCHAFT
Reel/Frame 008251/0932 →