Masazumi Takaoka

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Fukuoka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Production method of 4,6-diaminoresorcin
- Patent number 6,974,881
- Issue date Dec 13, 2005
- Mitsui Chemicals, Inc.
- Yukihiro Kumamoto
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for producing 1,5-diaminonaphthalene
- Patent number 6,828,461
- Issue date Dec 7, 2004
- Mitsui Chemicals, Inc.
- Yukihiro Kumamoto
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Production method of 4,6-diaminoresorcin
- Patent number 6,359,180
- Issue date Mar 19, 2002
- Mitsui Chemicals, Incorporated
- Yukihiro Kumamoto
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
High purity 1,3-dialkyl-2-imidazolidinone and preparation process o...
- Patent number 5,872,260
- Issue date Feb 16, 1999
- Mitsui Chemicals, Inc.
- Hideki Mizuta
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
Process for producing 1,5-diaminonaphthalene
- Publication number 20040143137
- Publication date Jul 22, 2004
- Mitsui Chemicals, Inc.
- Yukihiro Kumamoto
- C07 - ORGANIC CHEMISTRY
Information Patent Application
Production method of 4,6-diaminoresorcin
- Publication number 20020107415
- Publication date Aug 8, 2002
- Yukihiro Kumamoto
- C07 - ORGANIC CHEMISTRY