Inventor · Langenfeld, DE

Mark Wilhelm Drewes

206Patents
16h-index
159Co-inventors
89Inventor score

Filing activity: Mar 23, 1988 → Nov 9, 2020

Most-cited inventions

PatentTitleAreaCited byStatus
US6458965B1 Aryl phenyl substituted cyclic ketoenols Chemistry; Metallurgy 94 Expired
US6451843B1 Arylphenyl-substituted cyclic keto enols Chemistry; Metallurgy 88 Expired
US6417370B1 Arylphenyl-substituted cyclic keto-enols Chemistry; Metallurgy 85 Expired
US6861391B1 Trifluoromethyl-substituted spirocyclic ketoenols Chemistry; Metallurgy 43 Expired
US5981436A Substituted diazacyclohexanedi (thi) ones Chemistry; Metallurgy 35 Expired
US4990669A Optically active .alpha.-amino aldehydes, process for the preparation thereof, and the use thereof for the stereoselective preparation of optically active .beta.-amino alcohols Chemistry; Metallurgy 26 Expired
US5593945A N-cyanoaryl-nitrogen heterocycles Chemistry; Metallurgy 24 Expired
US5681794A N-cyanoaryl-nitrogen heterocycles Chemistry; Metallurgy 23 Expired
US7897543B2 Spiroketal-substituted cyclic ketoenols Chemistry; Metallurgy 21 Active
US6649565B1 Selective herbicides on the basis of a substituted phenylsulfonylaminocarbonyltriazolinone and safeners Human Necessities 21 Expired
US6297195A Substituted triazoloazine sulphonamides Human Necessities 20 Expired
US8058210B2 Arylphenyl-substituted cyclic keto-enols Chemistry; Metallurgy 19 Active
US6642180B1 Biphenyl-substituted cyclic ketoenols as pesticides Chemistry; Metallurgy 19 Expired
US6077813A Substituted aromatic thiocarboxylic acid amides and their use as herbicides Chemistry; Metallurgy 18 Expired
US6455472B1 Phenyl-substituted cyclic enaminones Fixed Constructions 16 Expired
US6602826B1 Heterocyclically substituted aromatic amino compounds with a herbicidal effect Chemistry; Metallurgy 16 Expired
US6693092B2 Arylphenyl-substituted cyclic ketoenols Chemistry; Metallurgy 15 Expired
US6200931A 5,6-dihydro-(1,4,2)-Dioxazin-substituted (hetero) aryl-(oxy-, imino-, alkyl-)-sulphonylamino(thio)carbonyl-heterocyclyl derivatives, their preparation and their use as herbicides Chemistry; Metallurgy 15 Expired
US6806264B2 Arylphenyl-substituted cyclic ketoenols Chemistry; Metallurgy 14 Expired
US7727933B2 2-ethyl-4,6-dimethyl-phenyl-substituted spirocyclic tetramic acid derivatives Chemistry; Metallurgy 14 Expired
US8138119B2 Alkoxyalkyl spirocyclic tetramic acids and tetronic acids Chemistry; Metallurgy 14 Active
US6746989B1 Substituted benzoylpyrazoles as herbicides Chemistry; Metallurgy 13 Expired
US6200934A Substituted arylsulphonylamino(thio)carbonyl-triazolin(thi)ones as herbicides Chemistry; Metallurgy 13 Expired
US6716832B2 Arylphenyl-substituted cyclic ketoenols Chemistry; Metallurgy 13 Expired
US6838415B1 Substituted benzoylisoxazoles and the use thereof as herbicides Chemistry; Metallurgy 13 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.