Inventor
KLEFFNER HANS W
DE10 patents
Patents
10 patentsUS5169990ADec 8, 1992
Preparation of 9,9-bis-(4-hydroxyphenyl)-fluorene
RUETGERSWERKE AG6 citations61
US5149886ASep 22, 1992
Preparation of 9,9-bis-(4-hydroxyphenyl)-fluorene
RUETGERSWERKE AG6 citations61
US5066806ANov 19, 1991
Novel separation process
RUETGERSWERKE AG2 citations61
US5271772ADec 21, 1993
Hazardous chemical decontamination process
RUETGERSWERKE AG2 citations58
US5380862AJan 10, 1995
Preparation of isomer-free 2,5-dichloro-pyridine
RUETGERSWERKE AG6 citations57
US5082944AJan 21, 1992
Production of pyridine-3-sulfonic acid
RUETGERSWERKE AG3 citations57
US4942239AJul 17, 1990
Process for the production of 2-hydroxypyridine
RUETGERSWERKE AG4 citations57
US5456935AOct 10, 1995
Food products
RUETGERSWERKE AG4 citations53
US4865620ASep 12, 1989
Hair dye composition
RUETGERSWERKE AG0 citations51
US4925942AMay 15, 1990
Preparation of quinuclidine-3-methanol
RUETGERSWERKE AG1 citations49