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Masayuki Nakai
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Chiba, JP
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last 30 patents
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Patent Grant
Method for preparing active carbons
Patent number
4,921,831
Issue date
May 1, 1990
Idemitsu Kosan Co., Ltd.
Masayuki Nakai
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for producting coal fillers
Patent number
4,849,021
Issue date
Jul 18, 1989
Idemitsu Kosan Co., Ltd.
Masayuki Nakai
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for modification of coal
Patent number
4,645,513
Issue date
Feb 24, 1987
Idemitsu Kosan Company Limited
Katsuzo Kubota
C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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Patent Grant
Process for improving low quality coal
Patent number
4,508,539
Issue date
Apr 2, 1985
Idemitsu Kosan Company Limited
Masayuki Nakai
C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...