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Masaya Yamamoto
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Yokohama-shi, JP
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Patents Grants
last 30 patents
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Patent Grant
Method for producing chemical reactive substance and polycarboxylic...
Patent number
6,825,289
Issue date
Nov 30, 2004
Nippon Shokubai Co., Ltd.
Masaya Yamamoto
C11 - ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES FATTY ACIDS...
Information
Patent Grant
Copolymer for cement admixtures and its production process and use
Patent number
6,727,315
Issue date
Apr 27, 2004
Masaya Yamamoto
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Cement dispersant and cement composition comprising this
Patent number
6,569,234
Issue date
May 27, 2003
Nippon Shokubai Co., Ltd.
Akihiko Yamashita
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Patents Applications
last 30 patents
Information
Patent Application
Method for producing chemical reactive substance and polycarboxylic...
Publication number
20030158077
Publication date
Aug 21, 2003
Masaya Yamamoto
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Application
Copolymer for cement admixtures and its production process and use
Publication number
20030125492
Publication date
Jul 3, 2003
NIPPON SHOKUBAI CO., LTD.
Masaya Yamamoto
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Application
Cement dispersant and cement composition comprising this
Publication number
20020050232
Publication date
May 2, 2002
NIPPON SHOKUBAI CO., LTD.
Akihiko Yamashita
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES