Inventor

SCHOPHOFF FRIEDRICH

DE5 patents

⚠️ This page may combine multiple inventors who share the name “SCHOPHOFF FRIEDRICH”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CASSELLA FARBWERKE MAINKUR AG

4 patents

US4795807AJan 3, 1989

Preparation of azo dyestuffs by diazotization and coupling in the presence of an ester

CASSELLA FARBWERKE MAINKUR AG13 citations70

US4695656ASep 22, 1987

Process for the preparation of 2,4-dinitrophenyl ethers

CASSELLA FARBWERKE MAINKUR AG12 citations70

US5069682ADec 3, 1991

Color-stable beta-modification of a monoazo dye, a process for its preparation, and its use

CASSELLA FARBWERKE MAINKUR AG2 citations60

US5288680AFeb 22, 1994

Process for the preparation of finished dyeings which are fast to thermomigration: orange-dyed polyester fabrics

CASSELLA FARBWERKE MAINKUR AG1 citations50

HOECHST AG

1 patent

US4686301AAug 11, 1987

Process for the preparation of 2,4-dinitrophenol alkoxyalkyl ethers

HOECHST AG2 citations60