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Gerhard Ullmann
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Gross-Gerau, DE
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last 30 patents
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Patent Grant
Tube for a shell and tube heat exchanger and process for the manufa...
Patent number
5,211,220
Issue date
May 18, 1993
Sigri Great Lakes Carbon GmbH
Adolf Swozil
F28 - HEAT EXCHANGE IN GENERAL
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Patent Grant
Electrode for electrochemical reactors
Patent number
5,192,411
Issue date
Mar 9, 1993
Hoechst Aktiengesellschaft
Hans-Karl W. vom Baur
C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information
Patent Grant
Adhesive connection of tubes formed of carbon or graphite
Patent number
4,941,692
Issue date
Jul 17, 1990
Sigri GmbH
Kurt Schaffner
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Connection of carbon or graphite tubes
Patent number
4,921,283
Issue date
May 1, 1990
Sigri GmbH
Kurt Schaffner
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...