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Ernst Luhrsen
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Bad Schwalbach, DE
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Patents Grants
last 30 patents
Information
Patent Grant
Multi-layer refractory wear body
Patent number
5,942,316
Issue date
Aug 24, 1999
Didier-Werke AG
Ernst Luhrsen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Fixing device for a ceramic sealing plate
Patent number
5,657,997
Issue date
Aug 19, 1997
Didier-Werke AG
Ernst Luhrsen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Immersion nozzle formed of separate members
Patent number
5,429,283
Issue date
Jul 4, 1995
Didier-Werke AG
Ernst Luhrsen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Process for inductive heating of ceramic shaped parts
Patent number
5,413,744
Issue date
May 9, 1995
Didier-Werke AG
Raimund Bruckner
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Refractory ceramic stopper, apparatus for support thereof, and asse...
Patent number
5,303,905
Issue date
Apr 19, 1994
Didier-Werke AG
Siegfried Pohl
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Process for manufacturing and preheating a shaped ceramic part
Patent number
5,190,716
Issue date
Mar 2, 1993
Didier-Werke AG
Raimund Bruckner
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Means and method for forming a sealed connection
Patent number
5,173,242
Issue date
Dec 22, 1992
Didier-Werke AG
Ernst Luhrsen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Apparatus for use in replacing a worn pouring pipe and for adjustin...
Patent number
5,173,199
Issue date
Dec 22, 1992
Didier-Werke AG
Raimund Bruckner
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Immersion nozzles for metal melts
Patent number
5,171,495
Issue date
Dec 15, 1992
Didier-Werke AG
Ernst Luhrsen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Components for forming a closing and/or regulating apparatus for ta...
Patent number
5,106,060
Issue date
Apr 21, 1992
Didier-Werke AG
Ullrich Hintzen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Refractory discharge device with separate external reinforcement me...
Patent number
5,092,500
Issue date
Mar 3, 1992
Didier-Werke AG
Udo Weber
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Rotary valve for a metallurgical vessel and rotor and stator therefor
Patent number
5,083,688
Issue date
Jan 28, 1992
Didier-Werke AG
Ernst Luhrsen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Apparatus for closing and/or regulating the tapping of molten metal
Patent number
5,080,265
Issue date
Jan 14, 1992
Didier-Werke AG
Ullrich Hintzen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Carbon-containing wearable refractory parts
Patent number
5,072,864
Issue date
Dec 17, 1991
Didier-Werke AG
Ernst Luhrsen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Closing and/or regulating apparatus for tapping molten metal from a...
Patent number
5,058,784
Issue date
Oct 22, 1991
Didier-Werke AG
Ulrich Hintzen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Horizontal or vertical rotary valve for a metallurgical vessel
Patent number
5,037,017
Issue date
Aug 6, 1991
Didier-Werke AG
Ernst Luhrsen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Refractory shutoff assembly capable of improved emergency closing
Patent number
5,025,961
Issue date
Jun 25, 1991
Didier-Werke AG
Ullrich Hintzen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Process of making carbon-bonded refractory shaped articles
Patent number
4,994,216
Issue date
Feb 19, 1991
Didier-Werke AG
Ullrich Hintzen
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
Horizontal or vertical rotary valve for a metallurgical vessel
Patent number
4,949,886
Issue date
Aug 21, 1990
Didier-Werke AG
Ernst Luhrsen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Assembly for connecting a metal member to a ceramic refractory member
Patent number
4,923,225
Issue date
May 8, 1990
Didier-Werke AG
Ernst Luhrsen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Rotary valve for a metallurgical vessel and rotor and stator therefor
Patent number
4,913,324
Issue date
Apr 3, 1990
Didier-Werke AG
Ernst Luhrsen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Refractory plate assembly including wear and erosion resistant inse...
Patent number
4,717,128
Issue date
Jan 5, 1988
Didier-Werke AG
Raimund Bruckner
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Refractory article suitable for casting molten metal
Patent number
4,634,685
Issue date
Jan 6, 1987
Didier-Werke AG
Siegfried Pohl
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Fastening means for a closure plate on a sliding shutter outlet in...
Patent number
4,508,324
Issue date
Apr 2, 1985
Didier-Werke AG
Ernst Luhrsen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Teeming pipe for use at the outlet of a melt container
Patent number
4,290,589
Issue date
Sep 22, 1981
Didier-Werke AG
Ernst Luhrsen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Bottom outlet or discharge for use in metallurgical vessels for ste...
Patent number
4,268,015
Issue date
May 19, 1981
Didier-Werke AG
Ernst Luhrsen
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Refractory spout brick
Patent number
4,203,538
Issue date
May 20, 1980
Didier-Werke AG
Ernst Luhrsen
B22 - CASTING POWDER METALLURGY