Norio Kotera

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Amagasaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method for purifying 1-aminoanthraquinone
- Patent number 4,695,407
- Issue date Sep 22, 1987
- Sumitomo Chemical Company, Limited
- Norio Kotera
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for producing aminophenyl-.beta.-hydroxyethylsulfone
- Patent number 4,612,394
- Issue date Sep 16, 1986
- Sumitomo Chemical Company, Limited
- Norio Kotera
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Purification of compounds having high melting point
- Patent number 4,323,431
- Issue date Apr 6, 1982
- Sumitomo Chemical Company Limited
- Masatoshi Takahashi
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Process for producing 8-amino-1-naphthol-3,6-disulfonic acid
- Patent number 4,111,979
- Issue date Sep 5, 1978
- Sumitomo Chemical Company, Limited
- Norio Kotera
- C07 - ORGANIC CHEMISTRY