Assignee
SUMIKIN CHEMICAL
JP·11 granted patents·54 citations·filing 1988–1998
Top patents by PatentIndex Score
11 records- 0168US5095135AProcess for the preparation of high-purity naphthalenecarboxylic acid estersSUMIKIN CHEMICAL·Filed 1991·Granted Mar 10, 1992·13 cites·20 claims
- 0251US5463156AMethod and apparatus for dehydrogenationSUMIKIN CHEMICAL·Filed 1993·Granted Oct 31, 1995·5 cites·10 claims
- 0348US5550284AProduction method for alkoxynaphthalenecarboxylic acidSUMIKIN CHEMICAL·Filed 1994·Granted Aug 27, 1996·4 cites·15 claims
- 0448US5017683ACondensed polycyclic, polynuclear aromatic thermosetting resin having good moldability and heat resistance; and preparation thereofSUMIKIN CHEMICAL·Filed 1989·Granted May 21, 1991·10 cites·11 claims
- 0544US5414174ASide-chain alkylation methodSUMIKIN CHEMICAL·Filed 1993·Granted May 9, 1995·3 cites·16 claims
- 0642US6054609AMethod of separating isomers of nitrotoluic acidSUMIKIN CHEMICAL·Filed 1998·Granted Apr 25, 2000·2 cites·4 claims
- 0742US5721332APhenolic resinSUMIKIN CHEMICAL·Filed 1996·Granted Feb 24, 1998·10 cites·8 claims
- 0836US5354899AProduction process of 1,4,5,8-naphthalene tetracarboxylic acidSUMIKIN CHEMICAL·Filed 1993·Granted Oct 11, 1994·1 cites·12 claims
- 0936US4925977AMethod for the preparation of naphthalene dicarboxylic acidsSUMIKIN CHEMICAL·Filed 1988·Granted May 15, 1990·2 cites·14 claims
- 1030US5416256AProcess for manufacturing 5-hydroxyisophthalic acidSUMIKIN CHEMICAL·Filed 1994·Granted May 16, 1995·0 cites·6 claims
- 1126US5094722AProcess for the purification of a dimethylphenol isomerSUMIKIN CHEMICAL·Filed 1990·Granted Mar 10, 1992·4 cites·5 claims
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