Inventor
YASUMATSU MASASHI
JP15 patents
⚠️ This page may combine multiple inventors who share the name “YASUMATSU MASASHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ORIENT CHEMICAL IND
12 patentsUS5976749ANov 2, 1999
Metal compound of aromatic hydroxycarboxylic acid, charge control agent, toner, and powdery paint
ORIENT CHEMICAL IND18 citations92
US6197467B1Mar 6, 2001
Charge control agent, manufacturing process therefor and toner
ORIENT CHEMICAL IND20 citations83
US5990332ANov 23, 1999
Metal compound of aromatic hydroxycarboxylic acid, charge control agent, toner, and powdery paint
ORIENT CHEMICAL IND14 citations73
US5843611ADec 1, 1998
Monoazo metal compound, composition thereof, charge control agent, toner and powdery paint
ORIENT CHEMICAL IND13 citations73
US6548648B1Apr 15, 2003
Process for preparing a monoazo metal complex salt compound for charge control agent and toner for developing electrostatic images
ORIENT CHEMICAL IND9 citations72
US7094513B2Aug 22, 2006
Charge control agent and toner for electrostatic image development
ORIENT CHEMICAL IND7 citations71
US6153735ANov 28, 2000
Monoazo metal compound, composition thereof, charge control agent, toner and powdery paint
ORIENT CHEMICAL IND2 citations62
US6756485B2Jun 29, 2004
Process for preparing a monoazo metal complex salt compound for charge control agent and toner for developing electrostatic images
ORIENT CHEMICAL IND4 citations61
US7479360B2Jan 20, 2009
Electric charge controlling agent, toner for developing electrostatic charge image containing the same, and method for forming image using the toner
ORIENT CHEMICAL IND3 citations60
US7413837B2Aug 19, 2008
Charge control agent and toner for electrostatic image development containing the same
ORIENT CHEMICAL IND3 citations56
US7879520B2Feb 1, 2011
Toner for developing electrostatic image and image formation process using it
ORIENT CHEMICAL IND0 citations51
US7875412B2Jan 25, 2011
Positive electrified charge control agent and positive electrified toner for developing electrostatic image
ORIENT CHEMICAL IND0 citations48