Inventor
ECKSTEIN UDO
DE23 patents
Patents
23 patentsUS5094688AMar 10, 1992
Triarylmethane color-forming agents
BAYER AG22 citations92
US6025490AFeb 15, 2000
Process for the preparation of substituted 4,4'-diaminostilbene-2,2'-disulphonic acids
BAYER AG21 citations91
US4670882AJun 2, 1987
Dyestuff laser
BAYER AG26 citations91
US5097034AMar 17, 1992
Triarylmethane color formers
BAYER AG20 citations82
US4923641AMay 8, 1990
Highly concentrated stable solutions of color-forming agent: for pressure-sensitive recording materials
BAYER AG16 citations82
US4783196ANov 8, 1988
Highly concentrated stable solutions of color-forming agents: for pressure-sensitive recording materials
BAYER AG19 citations82
US4510311AApr 9, 1985
Water-insoluble azolystyryl optical brighteners
BAYER AG21 citations82
US4326066AApr 20, 1982
Triazolyl coumarin compounds, processes for their preparation and their use as whiteners and laser dyestuffs
BAYER AG24 citations82
US4317782AMar 2, 1982
Distyryl compounds
BAYER AG26 citations80
US4888128ADec 19, 1989
Paper-coating slips containing fluorescent brighteners
BAYER AG23 citations79
US4897223AJan 30, 1990
Tri-phenyl methyl color-forming agents
BAYER AG7 citations74
US4166176AAug 28, 1979
Fluorescent dyestuffs
BAYER AG4 citations63
US4140852AFeb 20, 1979
Triazinyl styryl-benzoxazole fluorescent dyestuffs
BAYER AG3 citations63
US6121444ASep 19, 2000
Process for preparing substituted 4,4'-diaminostilbene-2,2'-disulphonic acid salts
BAYER AG5 citations62
US5189188AFeb 23, 1993
Bis(triarylmethane) compounds
BAYER AG2 citations62
US4812569AMar 14, 1989
Chromogenic phthalides
BAYER AG4 citations62
US6339117B2Jan 15, 2002
Whitened polymers and the use thereof in coating slips for coating substrates
BAYER AG2 citations61
US4184977AJan 22, 1980
Fluorescent dyestuffs
BAYER AG4 citations61
US6248887B1Jun 19, 2001
Process for preparing bis-alkoxy-triazinyl-amino-containing stilbene disulphonic acids or their derivatives
BAYER AG4 citations60
US4610807ASep 9, 1986
Distyryl compounds
BAYER AG3 citations60
US5233048AAug 3, 1993
Triarylmethane color formers
BAYER AG1 citations52
US4563532AJan 7, 1986
Process for the preparation of Δ4 -1,3,4-oxadiazolin-2-one compounds
BAYER AG0 citations52
US6387296B1May 14, 2002
Optically brightened plastics for optically brightening paper-coating compounds and paper-coating compounds optically brightened in this manner
BAYER AG1 citations51