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Dieter Seifert
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Neuoetting, DE
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Patents Grants
last 30 patents
Information
Patent Grant
Method for producing a semiconductor material
Patent number
6,309,467
Issue date
Oct 30, 2001
Wacker-Chemie GmbH
Hanns Wochner
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Bandsaw and process for cutting off slices from a workpiece
Patent number
6,021,772
Issue date
Feb 8, 2000
Wacker Siltronic Gesellschaft fur Halbleitermaterialien AG
Dieter Seifert
B28 - WORKING CEMENT, CLAY, OR STONE
Information
Patent Grant
Carrier for a semiconductor wafer and use of the carrier
Patent number
5,911,461
Issue date
Jun 15, 1999
Wacker Siltronic Gesellschaft fur Halbleitermaterialien AG
Bernd Sauter
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Mounting for carrier bodies in an apparatus for the deposition of s...
Patent number
5,593,465
Issue date
Jan 14, 1997
Wacker-Chemie GmbH
Dieter Seifert
C30 - CRYSTAL GROWTH
Information
Patent Grant
Method and device for producing seamless ribbon and wire loops, and...
Patent number
5,287,774
Issue date
Feb 22, 1994
Wacker-Chemitronic Gesellschaft fur Elektronik-Grundstoffe mbH
Dieter Seifert
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Material comprising silicon and process for its manufacture
Patent number
5,164,138
Issue date
Nov 17, 1992
Heliotronic Forschungs- und Entwicklungsgesellschaft fur Solarzellen-Grundsto...
Josef Dietl
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
Process for the purification of silicon by the action of an acid
Patent number
4,588,571
Issue date
May 13, 1986
Heliotronic Forschungs- und Entwicklungsgesellschaft fur Solarzellen-Grundsto...
Erich Bildl
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Tracking device
Patent number
4,585,318
Issue date
Apr 29, 1986
Dieter Seifert
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Process for the manufacture of semiconductor wafers
Patent number
4,461,671
Issue date
Jul 24, 1984
Heliotronic Forschungs- und Entwicklungs Gesellschaft fur Solarzellen-Grundst...
Dieter Seifert
C30 - CRYSTAL GROWTH
Information
Patent Grant
Apparatus for machining workpieces by abrasion
Patent number
4,204,515
Issue date
May 27, 1980
Wacker-Chemitronic Gesellschaft fur Elektronik-Grundstoffe mbH
Dieter Seifert
B28 - WORKING CEMENT, CLAY, OR STONE