Inventor
LEHR FRIEDRICH
DE11 patents
⚠️ This page may combine multiple inventors who share the name “LEHR FRIEDRICH”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CLARIANT FINANCE BVI LTD
5 patentsUS6844428B2Jan 18, 2005
Use of disazo compounds
CLARIANT FINANCE BVI LTD9 citations71
US6365719B1Apr 2, 2002
Bridged disazo compounds
CLARIANT FINANCE BVI LTD6 citations61
US5747657AMay 5, 1998
Reactive monoazo dyestuffs and the processes in which they are produced
CLARIANT FINANCE BVI LTD5 citations61
US7183409B2Feb 27, 2007
Basic mono- and bisazo compounds
CLARIANT FINANCE BVI LTD2 citations59
US7597721B2Oct 6, 2009
Concentrated aqueous compositions of dyestuffs
CLARIANT FINANCE BVI LTD1 citations50
SANDOZ LTD
4 patentsUS4670547AJun 2, 1987
Tetrakisazo compounds having two 1-hydroxy-3- or 4-sulfo-6- or 7-amino- or substituted amino-naphthalene coupling component radicals the amino or substituted amino groups of which are linked 1,3,5-triazine rings
SANDOZ LTD23 citations80
US5334710AAug 2, 1994
Compounds having non-linear optical properties
SANDOZ LTD9 citations71
US5006644AApr 9, 1991
Copper complexes of further substituted 2,4-di-[2'-(2"-hydroxyphenylazo)-1'-hydroxy-3'-sulfonaphthyl-6'-amino]-6-chloro-1,3,5-triazines
SANDOZ LTD4 citations61
US4820808AApr 11, 1989
Copper Complexes of disazo compounds having two substituted 2-hydroxyphenyl diazo component radicals and two 3-methylpyrazol-5-one coupling component radicals
SANDOZ LTD1 citations49