Inventor
PSAAR HUBERTUS
DE30 patents
⚠️ This page may combine multiple inventors who share the name “PSAAR HUBERTUS”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAYER AG
29 patentsUS5130442AJul 14, 1992
Chromogenic enamine compounds, their preparation and use as color formers
BAYER AG36 citations92
US5094688AMar 10, 1992
Triarylmethane color-forming agents
BAYER AG22 citations92
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
US4897494AJan 30, 1990
Bis(indolyl)ethylene process
BAYER AG10 citations74
US4897223AJan 30, 1990
Tri-phenyl methyl color-forming agents
BAYER AG7 citations74
US4869989ASep 26, 1989
Dry toners containing fanal pigments based on cationic dyes
BAYER AG8 citations74
US4847177AJul 11, 1989
Fanal pigments of closed-ring dry toners containing indamine-and diphenylmethane dyestuffs
BAYER AG10 citations74
US4138570AFeb 6, 1979
Indoline linked to 2-pyrazoline
BAYER AG8 citations74
US4125717ANov 14, 1978
Process for the preparation of oxazine dyestuffs
BAYER AG8 citations74
US4211436AJul 8, 1980
Pressure-sensitive recording material
BAYER AG13 citations73
US4931567AJun 5, 1990
Bis(indolyl)ethylene compounds
BAYER AG4 citations63
US4918048AApr 17, 1990
Thermoreactive recording material
BAYER AG3 citations63
US4902806AFeb 20, 1990
Bis(indolyl)ethylene aldehydes
BAYER AG2 citations63
US4600930AJul 15, 1986
Recording material which reacts under the influence of heat, its preparation and the use of acid-modified polymers as acceptors in this recording material
BAYER AG4 citations63
US4201707AMay 6, 1980
Methine dyestuffs containing a phenyl azo group
BAYER AG2 citations63
US4087241AMay 2, 1978
Printing inks for transfer printing
BAYER AG2 citations63
US4083680AApr 11, 1978
Printing inks for transfer printing
BAYER AG3 citations63
US3999939ADec 28, 1976
Transfer printing process
BAYER AG6 citations63
US3992140ANov 16, 1976
Printing inks for transfer printing
BAYER AG6 citations63
US3972879AAug 3, 1976
Process for isolating easily soluble basic oxazine dyestuffs and phenazine dyestuffs
BAYER AG4 citations63
US5134113AJul 28, 1992
Thermoreactive recording material
BAYER AG1 citations52
US5118814AJun 2, 1992
Tetraindolyl-heptamethine derivatives
BAYER AG1 citations52
US4849306AJul 18, 1989
Dry toners containing methinefanal pigments
BAYER AG1 citations52
US4808719AFeb 28, 1989
1H-imidazo[2,3-a]indol-2-ones as color-forming agents
BAYER AG0 citations52
US4145537AMar 20, 1979
Cationic dyestuffs
BAYER AG0 citations52
US4017484AApr 12, 1977
Cationic dyestuffs
BAYER AG0 citations52
US4007172AFeb 8, 1977
Dyestuff including pyrimido-indole moiety
BAYER AG0 citations52
US4143228AMar 6, 1979
Pyrazolinyl indolium dyestuffs
BAYER AG0 citations41