Yutaka Koba

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Process for preparing colorless rosins
- Patent number 5,606,016
- Issue date Feb 25, 1997
- Arakawa Kagaku Kogyo Kabushiki Kaisha
- Masao Maeda
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Process for preparing rosin and colorless rosin comprising dispropo...
- Patent number 5,395,920
- Issue date Mar 7, 1995
- Arakawa Kagaku Kogyp Kabushiki Kaisha
- Masao Maeda
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Process for preparing rosin ester and colorless rosin
- Patent number 5,387,669
- Issue date Feb 7, 1995
- Arakawa Kagaku Kogyo Kabushiki Kaisha
- Masao Maeda
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...