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Patents Grants
last 30 patents
Information
Patent Grant
Method for the directed solidification of molten metal and a castin...
Patent number
6,085,827
Issue date
Jul 11, 2000
Leybold Durferrit GmbH
Franz Hugo
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Apparatus for degreasing electrically conductive material
Patent number
5,544,194
Issue date
Aug 6, 1996
Leybold Durferrit GmbH
Franz Hugo
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Method for recycling materials containing plastic, rubber or lacquer
Patent number
5,505,008
Issue date
Apr 9, 1996
Leybold Durferrit GmbH
Franz Hugo
C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information
Patent Grant
Precision casting system with lock
Patent number
5,503,215
Issue date
Apr 2, 1996
Leybold Durferrit GmbH
Ulrich Betz
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Apparatus for the melting and treatment of metal
Patent number
5,480,127
Issue date
Jan 2, 1996
Leybold Durferrit GmbH
Alok Choudhury
C21 - METALLURGY OF IRON
Information
Patent Grant
Apparatus for fusing a solid layer of electrically conductive material
Patent number
5,479,438
Issue date
Dec 26, 1995
Leybold Durferrit GmbH
Mathias Blum
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Apparatus for the heat treatment of workpieces
Patent number
5,478,057
Issue date
Dec 26, 1995
Leybold Durferrit GmbH
Bernhard Wilhelmi
C21 - METALLURGY OF IRON
Information
Patent Grant
Method and apparatus for degreasing and compacting electrically con...
Patent number
5,445,789
Issue date
Aug 29, 1995
Leybold Durferrit GmbH
Erwin Wanetzky
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Closed induction furnace with a tilting apparatus
Patent number
5,425,047
Issue date
Jun 13, 1995
Leybold Durferrit GmbH
Ulrich Betz
C21 - METALLURGY OF IRON
Information
Patent Grant
Induction melting apparatus sealed against the atmosphere
Patent number
5,416,793
Issue date
May 16, 1995
Leybold Durferrit GmbH
Franz Hugo
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Process for hardening workpieces in a pulsed plasma discharge
Patent number
5,383,980
Issue date
Jan 24, 1995
Leybold Durferrit GmbH
Albrecht Melber
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Method for the treatment of alloy steels and refractory metals
Patent number
5,372,655
Issue date
Dec 13, 1994
Leybold Durferrit GmbH
Friedrich Preisser
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Closed induction furnace for the melting and casting of substances
Patent number
5,343,492
Issue date
Aug 30, 1994
Leybold Durferrit GmbH
Alfred Henn
F27 - FURNACES KILNS OVENS RETORTS
Information
Patent Grant
Power supply coil for the ceramic-free outlet of a melting pot
Patent number
5,294,096
Issue date
Mar 15, 1994
Leybold Durferrit GmbH
Felix Muller
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Teeming spout
Patent number
5,280,847
Issue date
Jan 25, 1994
Leybold Durferrit GmbH
Matthias Blum
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Apparatus for switching a high-current power source
Patent number
5,281,781
Issue date
Jan 25, 1994
Leybold Durferrit GmbH
Karl Herchenrother
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Induction furnace for melting and casting substances in a nonreacti...
Patent number
5,271,033
Issue date
Dec 14, 1993
Leybold Durferrit GmbH
Daniel Bethge
F27 - FURNACES KILNS OVENS RETORTS
Information
Patent Grant
Remelting arc furnace with movable electrode
Patent number
5,260,966
Issue date
Nov 9, 1993
Leybold Durferrit GmbH
Peter Schottlaender
F27 - FURNACES KILNS OVENS RETORTS
Information
Patent Grant
Method for remelting reactive metals
Patent number
5,234,486
Issue date
Aug 10, 1993
Leybold Durferrit GmbH
Alok Choudhury
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Method and apparatus for the automatic monitoring of operating safe...
Patent number
5,225,142
Issue date
Jul 6, 1993
Leybold Durferrit GmbH
Paul Heilmann
C21 - METALLURGY OF IRON
Patents Applications
last 30 patents
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