Patent Assignment
Reel/Frame 006504/0263
Change of Name Effective on 06/24/1992
Recorded: 1993-04-20
Pages: 6
Assignor
SIGRI GMBH
Executed: 1992-06-24
Assignee
SIGRI GREAT LAKES CARBON GMBH
POSTFACH 1160, MEITINGEN, W-8901, GERMANY
Covered Properties
(12)
Method for Dissolving Salt Encrustations in a Heat Exchanger
Patent:
4,651,655 →
Application:
06/836,162 →
Electrode for Electrochemical Processes
Patent:
4,849,086 →
Application:
07/127,657 →
Method of Manufacturing Cams by Powder Metallurgy
Patent:
4,851,189 →
Application:
07/233,244 →
Method and Apparatus for Extracting Saturated Steam in the Synthesis of Hydrogen Chloride Gas
Patent:
4,903,641 →
Application:
07/316,415 →
Graphite Tube Furnace with Specimen Support for Atomic Absorption Spectroscopy
Patent:
4,971,438 →
Application:
07/319,136 →
Connection of Carbon or Graphite Tubes
Patent:
4,921,283 →
Application:
07/355,404 →
Adhesive Connection of Tubes Formed of Carbon or Graphite
Patent:
4,941,692 →
Application:
07/355,406 →
Tube for a Shell and Tube Heat Exchanger and Process for the Manufacture Thereof
Patent:
5,211,220 →
Application:
07/364,788 →
Graphite Tube Furnace with Specimen Support for Atomic Absorption Spectroscopy
Patent:
4,946,278 →
Application:
07/373,174 →
Process for the Inhibition of the Puffing of Cokes Produced from Coal Tar Pitches
Patent:
5,104,518 →
Application:
07/489,048 →
Process for the Production of Non-Puffing Shaped Carbon Bodies
Patent:
5,068,026 →
Application:
07/489,192 →
Graphite Tube Furnace with Stationary Specimen Support for Atomic Absorption Spectroscopy
Patent:
5,083,864 →
Application:
07/656,287 →
Related Assignments
(14)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignors Interest.
Apr 17, 1989
From: HUTSCH, BRUNO; VESPER, WOLFGANG
To: RINGSDORFF-WERKE GMBH
Reel/Frame 005063/0742 →
Assignment of Assignors Interest.
Apr 17, 1989
From: DONCH, JURGEN; SCHELB, BERNHARD; ZIMMERMANN, WOLFGANG
To: RINGSDORFF-WERKE GMBH, A GERMAN CORP.
Reel/Frame 005072/0562 →
Assignment of Assignors Interest.
Dec 11, 1989
From: GOHL, EDUARD; MULLER, JOHANN; SPADERNA, ALOIS
To: SIGRI GMBH, MEITINGEN, FED. REP. OF GERMANY, A CORP. OF GERMANY
Reel/Frame 005190/0599 →
Assignment of Assignors Interest.
Feb 12, 1990
From: SCHAFFNER, KURT; SWOZIL, ADOLF; ULLMANN, GERHARD
To: SIGRI GMBH, A GERMAN CORP.
Reel/Frame 005232/0551 →
Assignment of Assignors Interest.
May 17, 1990
From: SCHAFFNER, KURT; SWOZIL, ADOLF; ULLMANN, GERHARD
To: SIGRI GMBH, A GERMAN CORP.
Reel/Frame 005323/0985 →
Assignment of Assignors Interest.
Jun 1, 1990
From: HUTSCH, BRUNO; SCHMIDT, BERND
To: RINGSDORFF-WERKE GMBH
Reel/Frame 005337/0100 →
Assignment of Assignors Interest.
Jul 13, 1990
From: JAGER, HUBERT; LORENZ, ALFRED
To: SIGRI GMBH, FEDERAL REPUBLIC OF GERMANY A GERMAN CORP.
Reel/Frame 005377/0606 →
Assignment of Assignors Interest.
Jul 31, 1990
From: JAGER, HUBERT
To: SIGRI GMBH
Reel/Frame 005392/0238 →
Assignment of Assignors Interest.
Aug 31, 1990
From: HUTSCH, BRUNO; SCHMIDT, BERND
To: RINGSDORFF-WERKE GMBH
Reel/Frame 005427/0788 →
Assignment of Assignors Interest.
Nov 18, 1991
From: HUETSCH, BRUNO; SCHMIDT, BERND
To: RINGSDORFF-WERKE GMBH A GERMAN CORPORATION
Reel/Frame 005909/0001 →
Assignment of Assignors Interest.
Apr 20, 1993
From: SWOZIL, ADOLF; ULLMAN, GERHARD
To: SIGRI GREAT LAKES CARBON GMBH
Reel/Frame 006498/0667 →
Change of Name
Dec 9, 1996
From: SIGRI GREAT LAKES CARBON GMBH
To: SGL CARBON AKTIENGESELLSCHAFT
Reel/Frame 008251/0932 →
Merger
Dec 9, 1996
From: RINGSFORFF-WERKE GMBH
To: SGL CARBON AG
Reel/Frame 008251/0919 →
Assignment of Assignor's Interest
May 26, 1998
From: SGL CARBON AG
To: SGL TECHNIK GMBH
Reel/Frame 009178/0460 →