Inventor
KELLER KARLFRIED
DE7 patents
⚠️ This page may combine multiple inventors who share the name “KELLER KARLFRIED”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CASSELLA FARBWERKE MAINKUR AG
6 patentsUS4822372AApr 18, 1989
Processing for tanning leather
CASSELLA FARBWERKE MAINKUR AG7 citations71
US4223141ASep 16, 1980
Preparation of methoxy-methyl melamines
CASSELLA FARBWERKE MAINKUR AG17 citations71
US4143016AMar 6, 1979
Preparation of melamine derivatives
CASSELLA FARBWERKE MAINKUR AG7 citations70
US4039493AAug 2, 1977
Melamine-formaldehyde condensates and mixtures thereof
CASSELLA FARBWERKE MAINKUR AG10 citations70
US4079040AMar 14, 1978
Sulfo-containing phenol-formaldehyde condensates
CASSELLA FARBWERKE MAINKUR AG7 citations67
US4043984AAug 23, 1977
Aminoplasts elasticized with benzoic acid esters
CASSELLA FARBWERKE MAINKUR AG6 citations61