Katsumi Tomura

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Sodegaura, JP

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Patents Grantslast 30 patents

Information 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