Inventor
KUMAGAE YOJIRO
JP16 patents
⚠️ This page may combine multiple inventors who share the name “KUMAGAE YOJIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
YAMAMOTO CHEMICALS INC
10 patentsUS6066729AMay 23, 2000
Photothermal conversion material
YAMAMOTO CHEMICALS INC20 citations90
US6468713B1Oct 22, 2002
Phthalocyanine compounds, process for producing the same, and near infrared absorbent comprising the same
YAMAMOTO CHEMICALS INC13 citations73
US5973140AOct 26, 1999
Phthalocyanine compound, its intermediate, process for producing the compound, and use thereof
YAMAMOTO CHEMICALS INC5 citations71
US5627287AMay 6, 1997
Phthalide compound and a near infrared absorber and a recording material each comprising the same compound
YAMAMOTO CHEMICALS INC7 citations68
US5376617ADec 27, 1994
Crystal modification of 2-(3-methylanilion)-3-methyl-6-diethylamino-fluoran, process for the preparation thereof, and recording materials containing said crystal modification
YAMAMOTO CHEMICALS INC2 citations59
US11015061B2May 25, 2021
Phthalocyanine-based compound and uses of same
YAMAMOTO CHEMICALS INC0 citations56
US5438032AAug 1, 1995
Crystal modifications of 2-m-toluidino-3-methyl-6-di-n-butylaminofluoran, process for preparing thereof, and recording materials containing said crystal modifications
YAMAMOTO CHEMICALS INC0 citations51
US5342967AAug 30, 1994
Crystal modifications of 2-M-toluidino-3-methyl-6-di-N-butylaminofluoran, process for preparing thereof, and recording materials containing said crystal modifications
YAMAMOTO CHEMICALS INC1 citations51
US6093832AJul 25, 2000
Diiminoisoindoline compound and the process for producing the compound and use thereof
YAMAMOTO CHEMICALS INC1 citations50
US5338866AAug 16, 1994
Crystal modification of 2-(3-methylanilino)-3-methyl-6-diethylaminofluoran, process for the preparation thereof, and recording materials containing said crystal modification
YAMAMOTO CHEMICALS INC1 citations48
MITSUI CHEMICALS INC
3 patentsUS5804102ASep 8, 1998
Plasma display filter
MITSUI CHEMICALS INC99 citations96
US6162520ADec 19, 2000
Optical recording medium and dipyrromethene metal chelate compound for use therein
MITSUI CHEMICALS INC6 citations72
US6355327B1Mar 12, 2002
Optical recording medium and dipyrromethene metal chelate compound for use therein
MITSUI CHEMICALS INC0 citations51