Inventor · Obrigheim, DE

Helmut Walter

219Patents
17h-index
129Co-inventors
89Inventor score

Filing activity: Dec 18, 1989 → Dec 3, 2021

Most-cited inventions

PatentTitleAreaCited byStatus
US6479436B1 Hetaroyl cyclohexanedione derivatives with herbicidal effect Chemistry; Metallurgy 58 Expired
US6262074A 4-Hetaroylpyrazol derivatives and the use thereof as herbicides Human Necessities 58 Expired
US5846907A Herbicidally active pyrazol-4-ylbenzoyl compounds Chemistry; Metallurgy 51 Expired
US6534444B1 Herbicidal mixtures having a synergistic effect Human Necessities 42 Expired
US6004903A 2-Anylocyclohexanediones having improved herbicidal properties Chemistry; Metallurgy 34 Expired
US5508412A Phthalimides useful as intermediate compounds Chemistry; Metallurgy 33 Expired
US5670454A Herbicides of the auxin type for treating transgenic crop plants Chemistry; Metallurgy 31 Expired
US5783522A Substituted 2-phenylpyridines Chemistry; Metallurgy 31 Expired
US5798451A Quinoline-3-carboxamides, their manufacture and use Chemistry; Metallurgy 30 Expired
US6165944A 4-(3-heterocyclyl-1-benzoyl) pyrazoles and their use as herbicides Chemistry; Metallurgy 28 Expired
US6472349B1 Pyridine-2,3-dicarboxylic acid diamides Chemistry; Metallurgy 25 Expired
US5571774A Pyridine-2,3-dicarboximides, their preparation and their use for controlling undesired plant growth Chemistry; Metallurgy 19 Expired
US5378679A Heteroaromatically condensed hydroxypyridonecarboxamides, their preparation and use Chemistry; Metallurgy 18 Expired
US5597776A Substituted pyrido[2, 3-dipyrimidines as antidotes for herbicidal cyclohexenones Human Necessities 18 Expired
US5972841A Quinoline-3-carboxamides, their manufacture and use Chemistry; Metallurgy 18 Expired
US5703017A 3-(Het) arylcarboxylic acid derivatives, their preparation and intermediates for their preparation Chemistry; Metallurgy 17 Expired
US5276009A Dicarboximides and their use as herbicides Chemistry; Metallurgy 17 Expired
US5593943A Heteroaromatically condensed hydroxypyridonecarboxamides, their preparation and use as herbicides Chemistry; Metallurgy 16 Expired
US5190573A Cyclohexenone oxime ethers, their preparation and their use as herbicides Chemistry; Metallurgy 15 Expired
US5486618A Substituted 5-aminopyrazoles Chemistry; Metallurgy 15 Expired
US6624119B1 3-[Benz(ox/thi)azol-7-yl]-1h-pyrimidine-2,4-diones Chemistry; Metallurgy 15 Expired
US5846906A Herbicidally active phenyldiketone compounds Chemistry; Metallurgy 15 Expired
US6153759A Heterocyclic benzoyl intermediates for herbicidal compounds Chemistry; Metallurgy 14 Expired
US5252540A Sulfonamides Chemistry; Metallurgy 14 Expired
US5422335A Herbicides containing substituted 2-aminothiophenes Chemistry; Metallurgy 14 Expired

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