Assignee
EISAI KAGAKU KK
JP·15 granted patents·76 citations·filing 1987–1997
Top patents by PatentIndex Score
15 records- 0175US4906411AProcess for producing 2-methyl-1,4-naphthoquinoneEISAI KAGAKU KK·Filed 1987·Granted Mar 6, 1990·19 cites·6 claims
- 0260US5412124APreparation process of naphthoquinone derivative and intermediate for the preparation thereofEISAI KAGAKU KK·Filed 1994·Granted May 2, 1995·6 cites·7 claims
- 0354US5547580APurification method of crude productEISAI KAGAKU KK·Filed 1995·Granted Aug 20, 1996·22 cites·13 claims
- 0454US5476955AProcess for the preparation of a quinone derivativeEISAI KAGAKU KK·Filed 1994·Granted Dec 19, 1995·4 cites·5 claims
- 0554US5216151AProcess for producing benzylphthalazinone derivatives and salts thereofEISAI KAGAKU KK·Filed 1991·Granted Jun 1, 1993·10 cites·6 claims
- 0650US5428173AProcess for the preparation of aminothiadiazolylacetyl halide derivtivesEISAI KAGAKU KK·Filed 1993·Granted Jun 27, 1995·4 cites·11 claims
- 0743US5677471AProcess for the preparation of quinone derivativeEISAI KAGAKU KK·Filed 1996·Granted Oct 14, 1997·2 cites·2 claims
- 0842US5998611AProcess for producing cephem compounds in an aqueous mediumEISAI KAGAKU KK·Filed 1997·Granted Dec 7, 1999·3 cites·10 claims
- 0938US5686635ATetrahydro-alkenyl-methanonaphthalene-5,8-dione derivativesEISAI KAGAKU KK·Filed 1996·Granted Nov 11, 1997·1 cites·2 claims
- 1037US5665888AProtected aminothiazolylacetic acid derivativesEISAI KAGAKU KK·Filed 1995·Granted Sep 9, 1997·1 cites·1 claims
- 1137US5631378AProtected aminothiazolylacetic acid derivativesEISAI KAGAKU KK·Filed 1996·Granted May 20, 1997·1 cites·1 claims
- 1236US5874611AButenyl hydroquinone derivativesEISAI KAGAKU KK·Filed 1996·Granted Feb 23, 1999·2 cites·1 claims
- 1336US5608092A1,4,4a 5,8,9a -hexahydro-1α,4α-methanoan-thraquinone derivative(s)EISAI KAGAKU KK·Filed 1995·Granted Mar 4, 1997·1 cites·2 claims
- 1431US5650518AProtected aminothiazolylacetic acid derivativesEISAI KAGAKU KK·Filed 1996·Granted Jul 22, 1997·0 cites·1 claims
- 1529US5565586AOxidative process for the preparation of allyl quinone derivativesEISAI KAGAKU KK·Filed 1995·Granted Oct 15, 1996·0 cites·2 claims
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