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Minoru Hanazaki
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Kakogawa, JP
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Patents Grants
last 30 patents
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Patent Grant
Fine particles of petaloid porous hydroxyapatite and process for pr...
Patent number
6,033,780
Issue date
Mar 7, 2000
Maruo Calcium Company Limited
Hidehiko Nishioka
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Additive for synthetic resins and a synthetic resin composition
Patent number
5,976,687
Issue date
Nov 2, 1999
Maruo Calcium Company, Ltd.
Hidehiko Nishioka
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Additive for synthetic resins and synthetic resin compositions
Patent number
5,844,022
Issue date
Dec 1, 1998
Maruo Calcium Company Limited
Hidehiko Nishioka
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Method for manufacturing monodisperse vaterite type calcium carbonate
Patent number
5,494,651
Issue date
Feb 27, 1996
Maruo Calcium Company Limited
Shiro Minayoshi
B82 - NANO-TECHNOLOGY
Information
Patent Grant
Monodisperse vaterite type calcium carbonate, its manufacturing met...
Patent number
5,275,651
Issue date
Jan 4, 1994
Maruo Calcium Company Limited
Shiro Minayoshi
B82 - NANO-TECHNOLOGY
Information
Patent Grant
Filler for paper-making and neutral paper-making process by the use...
Patent number
4,725,318
Issue date
Feb 16, 1988
Maruo Calcium Company, Limited
Shiro Minayoshi
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE