Inventor
FICKERT WERNER
21 patents
Patents
21 patentsUS4659846AApr 21, 1987
Preparation of 2,5-diloweralkyl-1.4:3,6-dianhydrosorbitols
RUETGERSWERKE AG25 citations92
US4567272AJan 28, 1986
Pyrrole containing 2-aminonitropyridine derivatives
RUETGERSWERKE AG43 citations92
US4632991ADec 30, 1986
Process for production of zinc 2-mercaptopyridine-n-oxide
RUETGERSWERKE AG15 citations79
US4918059AApr 17, 1990
Low molecular weight alkali metal huminates, method for their preparation and applications thereof
RUETGERSWERKE AG18 citations78
US4377699AMar 22, 1983
5-Chloro-indole preparation
RUETGERSWERKE AG7 citations73
US4952563AAug 28, 1990
Waterfree application form of low molecular weight alkali huminates
RUETGERSWERKE AG14 citations70
US4921840AMay 1, 1990
Method for the preparation of low molecular weight alkali metal huminates
RUETGERSWERKE AG7 citations70
US4659830AApr 21, 1987
Process for the production of zinc 2-mercaptopyridine N-oxide
RUETGERSWERKE AG11 citations70
US4661115AApr 28, 1987
Hair dyeing agents
RUETGERSWERKE AG7 citations67
US4546190AOct 8, 1985
Method for producing 3,5,6-trichloro-1H-pyridine-2-on
RUETGERSWERKE AG5 citations62
US4529800AJul 16, 1985
Novel process for the preparation of 2-halo-3-nitro-6-alkoxy-pyridines
RUETGERSWERKE AG3 citations62
US4946829AAug 7, 1990
Process and huminate fraction
RUETGERSWERKE AG5 citations61
US4582910AApr 15, 1986
Method for preparation of 4-halogenonaphthalic acid anhydrides
RUETGERSWERKE AG3 citations61
US4549024AOct 22, 1985
Oxidation of quinoline to quinolinic acid
RUETGERSWERKE AG3 citations61
US4719298AJan 12, 1988
Side chain chlorination process of heterocycles
RUETGERSWERKE AG4 citations57
US4564700AJan 14, 1986
Process for the preparation of fluorene-9-carboxylic acid
RUETGERSWERKE AG0 citations51
US4256892AMar 17, 1981
Preparation of bis-2-pyridyl-disulfides
RUETGERSWERKE AG1 citations51
US4228083AOct 14, 1980
Process for the production of β-(5-nitro-2-furyl)-acrolein
RUETGERSWERKE AG1 citations51
US4357277ANov 2, 1982
Novel process for the preparation of N,N'-bisacyl hydrazides
RUETGERSWERKE AG0 citations46
US4332728AJun 1, 1982
Process for the preparation of bisacyl hydrazines
RUETGERSWERKE AG0 citations46
US4493935AJan 15, 1985
Preparation of 1H-pyrrol-2-acetic acid esters
RUETGERSWERKE AG0 citations41