Inventor · disambiguated record
Yojiro Kumagae
Also filed as: KUMAGAE YOJIRO
16 granted patents·3 pending applications·165 citations·filing 1982–2018
92Inventor score
Files withYAMAMOTO CHEMICALS INC10MITSUI CHEMICALS INC5CIBA SC HOLDING AG1FUJI XEROX CO LTD1FUJITSU LTD1
Top patents by PatentIndex Score
19 records- 0194US5804102APlasma display filterMITSUI CHEMICALS INC·Filed 1996·Granted Sep 8, 1998·99 cites·18 claims
- 0281US6066729APhotothermal conversion materialYAMAMOTO CHEMICALS INC·Filed 1998·Granted May 23, 2000·20 cites·10 claims
- 0379US6468713B1Phthalocyanine compounds, process for producing the same, and near infrared absorbent comprising the sameYAMAMOTO CHEMICALS INC·Filed 2000·Granted Oct 22, 2002·13 cites·14 claims
- 0458US7332261B2Phthalocyanine compound, process for preparing the same, and optical recording medium containing the sameCIBA SC HOLDING AG·Filed 2003·Granted Feb 19, 2008·4 cites·12 claims
- 0556US5973140APhthalocyanine compound, its intermediate, process for producing the compound, and use thereofYAMAMOTO CHEMICALS INC·Filed 1998·Granted Oct 26, 1999·5 cites·14 claims
- 0649US11015061B2Phthalocyanine-based compound and uses of sameYAMAMOTO CHEMICALS INC·Filed 2018·Granted May 25, 2021·0 cites·12 claims
- 0747US2010233415A1Optical recording medium and azo metal chelate compoundMITSUI CHEMICALS INC·Filed 2007·Application pending·0 cites
- 0846US6162520AOptical recording medium and dipyrromethene metal chelate compound for use thereinMITSUI CHEMICALS INC·Filed 1998·Granted Dec 19, 2000·6 cites·29 claims
- 0944US2009098410A1Trimethine Dimer Compound and Optical Recording Medium Using the SameMITSUI CHEMICALS INC·Filed 2006·Application pending·0 cites
- 1043US6821696B2Toner for optical fixing, manufacturing method therefor and image formation apparatus using itFUJI XEROX CO LTD·Filed 2002·Granted Nov 23, 2004·2 cites·13 claims
- 1143US5627287APhthalide compound and a near infrared absorber and a recording material each comprising the same compoundYAMAMOTO CHEMICALS INC·Filed 1995·Granted May 6, 1997·7 cites·19 claims
- 1242US4523018ACertain bis(benzoyl)pyridine compoundsYAMAMOTO KAGAKU GOSEI KK·Filed 1982·Granted Jun 11, 1985·4 cites·18 claims
- 1341US6355327B1Optical recording medium and dipyrromethene metal chelate compound for use thereinMITSUI CHEMICALS INC·Filed 2000·Granted Mar 12, 2002·0 cites·7 claims
- 1440US5342967ACrystal modifications of 2-M-toluidino-3-methyl-6-di-N-butylaminofluoran, process for preparing thereof, and recording materials containing said crystal modificationsYAMAMOTO CHEMICALS INC·Filed 1992·Granted Aug 30, 1994·1 cites·10 claims
- 1537US6093832ADiiminoisoindoline compound and the process for producing the compound and use thereofYAMAMOTO CHEMICALS INC·Filed 1999·Granted Jul 25, 2000·1 cites·17 claims
- 1637US5376617ACrystal modification of 2-(3-methylanilion)-3-methyl-6-diethylamino-fluoran, process for the preparation thereof, and recording materials containing said crystal modificationYAMAMOTO CHEMICALS INC·Filed 1994·Granted Dec 27, 1994·2 cites·4 claims
- 1735US5338866ACrystal modification of 2-(3-methylanilino)-3-methyl-6-diethylaminofluoran, process for the preparation thereof, and recording materials containing said crystal modificationYAMAMOTO CHEMICALS INC·Filed 1992·Granted Aug 16, 1994·1 cites·4 claims
- 1833US2002142240A1Toner for optical fixing and image formation apparatus using itFUJITSU LTD·Filed 2001·Application pending·0 cites
- 1931US5438032ACrystal modifications of 2-m-toluidino-3-methyl-6-di-n-butylaminofluoran, process for preparing thereof, and recording materials containing said crystal modificationsYAMAMOTO CHEMICALS INC·Filed 1994·Granted Aug 1, 1995·0 cites·9 claims
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