Inventor
SAHM WILFRIED
12 patents
Patents
12 patentsUS4002423AJan 11, 1977
Benzofuran derivatives process for their preparation and their use as optical brighteners
HOECHST AG23 citations81
US3974172AAug 10, 1976
Benzofuran derivatives
HOECHST AG17 citations73
US4087610AMay 2, 1978
Process for the preparation of 5-acetoacetylamino-benzimidazolone
HOECHST AG13 citations71
US3931215AJan 6, 1976
Benzofuran derivatives
HOECHST AG11 citations71
US4153798AMay 8, 1979
Process for the manufacture of 5-acetoacetylamino-benzimidazolone
HOECHST AG11 citations66
US4039555AAug 2, 1977
Benzofuran derivatives, process for preparing them and their use as optical brighteners
HOECHST AG2 citations62
US4001130AJan 4, 1977
Optical brighteners
HOECHST AG3 citations62
US4122256AOct 24, 1978
Heterocyclic azomethines
HOECHST AG3 citations61
US4052433AOct 4, 1977
Aromatic azomethines
HOECHST AG3 citations61
US3994879ANov 30, 1976
Process for the preparation of benzofuran compounds
HOECHST AG5 citations61
US3940340AFeb 24, 1976
Peracylated polyamines compatible with optical brighteners as activators for inorganic peroxo compounds
HOECHST AG4 citations60
US3972877AAug 3, 1976
Butadiene derivatives, process for their preparation and their use as optical brighteners
HOECHST AG0 citations51