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Tadashi Hiraiwa
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Iwaki, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Cerium oxide-based abrasive, and production method and use thereof
Patent number
7,722,692
Issue date
May 25, 2010
Show A Denko K.K.
Tadashi Hiraiwa
B24 - GRINDING POLISHING
Information
Patent Grant
Coated fused alumina particles and production process thereof
Patent number
5,633,084
Issue date
May 27, 1997
Showa Denko K.K.
Tadashi Hiraiwa
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
Sintered alumina abrasive grain and abrasive products
Patent number
5,387,268
Issue date
Feb 7, 1995
Showa Denko Kabushiki Kaisha
Tadashi Hiraiwa
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
Abrasive grain and manufacture for the same
Patent number
5,304,226
Issue date
Apr 19, 1994
Showa Denko K.K.
Mitsuru Hasegawa
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Alumina-based ceramics materials, abrasive materials and method for...
Patent number
5,215,551
Issue date
Jun 1, 1993
Showa Denko K.K.
Tetsuo Hatanaka
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
Abrasive grain and method for manufacturing the same
Patent number
5,192,339
Issue date
Mar 9, 1993
Showa Denko K.K.
Mitsuru Hasegawa
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Hard tissue substitute composition
Patent number
4,902,649
Issue date
Feb 20, 1990
Showa Denko Kabushiki Kaisha
Yoshitaka Kimura
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information
Patent Grant
Method for production of mullite of high purity
Patent number
4,774,068
Issue date
Sep 27, 1988
Showa Denko K.K.
Tadashi Hiraiwa
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
Method for dehydration of a composition of a fine powder and water
Patent number
4,686,774
Issue date
Aug 18, 1987
Showa Denko K.K.
Tadashi Hiraiwa
F26 - DRYING
Patents Applications
last 30 patents
Information
Patent Application
Cerium Oxide-Based Abrasive, and Production Method and Use Thereof
Publication number
20090035202
Publication date
Feb 5, 2009
Tadashi Hiraiwa
B24 - GRINDING POLISHING
Information
Patent Application
Mixed Rare Earth Oxide, Mixed Rare Earth Fluoride, Cerium-Based Abr...
Publication number
20070258875
Publication date
Nov 8, 2007
SHOWA DENKO K.K.
Tadashi Hiraiwa
C01 - INORGANIC CHEMISTRY