Helmut Burstell
29Patents
9h-index
24Co-inventors
71Inventor score
Filing activity: Jul 17, 1978 → Nov 6, 1992
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4891057A | Phenylpyrazolecarboxylic acid derivatives, their preparation, and their use as plant-growth regulators and safeners | Chemistry; Metallurgy | 73 | Expired |
| US5082949A | Phenylpyrazolecarboxylic acid derivative preparation | Chemistry; Metallurgy | 25 | Expired |
| US4601747A | N-alkoxyaminosulfonylureas and N-alkylsulfonylaminosulfonylureas and pyrimidino thiadiazine oxides as herbicides and plant growth-regulators | Chemistry; Metallurgy | 24 | Expired |
| US4614535A | Herbicidal imidazolinones | Chemistry; Metallurgy | 22 | Expired |
| US4718937A | N-alkoxyaminosulfonylureas and N-alkylsulfonylaminosulfonylureas | Chemistry; Metallurgy | 15 | Expired |
| US4182624A | Imidazole carboxylic acids and derivatives thereof | Chemistry; Metallurgy | 12 | Expired |
| US5104443A | Heterocyclic 2-alkoxyphenoxysulfonylureas and the use thereof as herbicides or plant growth regulators | Human Necessities | 12 | Expired |
| US4492598A | Sulfonylureas having heterocyclic substituents, and their use in agriculture | Chemistry; Metallurgy | 11 | Expired |
| US4637828A | Plant growth regulators | Human Necessities | 9 | Expired |
| US4808213A | 2,3,6-substituted phenylimidazole derivatives and the use thereof as growth regulators | Chemistry; Metallurgy | 8 | Expired |
| US4440565A | Heterocyclically substituted (halogeno)alkyl- and (halogeno)alkoxysulfonylureas, and their use in agriculture | Human Necessities | 7 | Expired |
| US4477276A | Heterocyclic phenyl ethers and their herbicidal use | Chemistry; Metallurgy | 7 | Expired |
| US4564381A | Increase of carbohydrate accumulation in plants by means of substituted derivatives of phenoxyalkanoic acids and cyclohexanediones | Human Necessities | 6 | Expired |
| US4623380A | Isoindoles, processes for their preparation and their use as herbicidal agents | Chemistry; Metallurgy | 5 | Expired |
| US5015284A | Alkyl- and alkenylsulfonylureas which are substituted in the heterocycle, and their use as herbicides or plant growth regulators | Human Necessities | 5 | Expired |
| US5102443A | Heterocyclically substituted phenoxysulfonylureas, and the use thereof as herbicides or plant growth regulators | Human Necessities | 4 | Expired |
| US4755213A | 1-phenylimidazolecarboxylic acid amides and their use as growth regulators | Chemistry; Metallurgy | 4 | Expired |
| US4747868A | Growth-regulating, fungicidal, and herbicidal cyclohexylimidazole and cyclohexenylimidazole derivatives, compositions, and methods of use therefor | Chemistry; Metallurgy | 3 | Expired |
| US4615726A | Herbicidal 1-acylimidazolinones | Chemistry; Metallurgy | 3 | Expired |
| US4594098A | Phosphorus-containing functional derivatives of acetic acid, process for their preparation and herbicidal and growth-regulating agents containing them | Chemistry; Metallurgy | 3 | Expired |
| US5022916A | Substituted sulfonyldiamides, processes for their preparation, and their use as herbicides and plant growth regulators | Human Necessities | 2 | Expired |
| US5021578A | Certain perfluoroloweralkoxy-2-pyridyloxy propionates having herbicidal activity | Human Necessities | 1 | Expired |
| US4925480A | Heterocyclically substituted N-sultamsulfonamides, and their use as herbicides and plant growth regulators | Human Necessities | 1 | Expired |
| US4239525A | 1,2,4-Triazole derivatives | Chemistry; Metallurgy | 0 | Expired |
| US4820335A | 1-substituted imidazole-5-carboxylic acid derivatives, their preparation and their use as biocides | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.