Hellmut Hoffmann
48Patents
4h-index
17Co-inventors
56Inventor score
Filing activity: Jun 29, 1973 → Aug 6, 1985
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3949022A | N-[N',N'-disubstituted-aminomethylidene]-(thiono)thiol-phosphoric acid ester imides | Chemistry; Metallurgy | 4 | Expired |
| US3975523A | O-(2-Carbisopropoxyphenyl)-thiono-phosphoric (phosphonic) acid ester-amides and ester-imides and insecticidal and acaricidal composition and method | Chemistry; Metallurgy | 4 | Expired |
| US4001404A | N-Dithiophosphoryl-carbamic acid esters | Chemistry; Metallurgy | 4 | Expired |
| US3957977A | O-Alkyl-o-[3-methyl-1,2,4-triazolo-(2,3,b )-thiazol(6)-yl](thiono)-phosphoric (phosphonic) acid esters | Human Necessities | 4 | Expired |
| US4139615A | O-alkyl-S-alkyl-O-(4-trifluoromethylthio-phenyl)-(thiono)-thiol-phos phoric acid esters and pesticidal compositions and methods | Chemistry; Metallurgy | 4 | Expired |
| US4140734A | Alkoxyethyl dithiophosphonic acid ester halides | Chemistry; Metallurgy | 3 | Expired |
| US4159324A | Combating insects, acarids and nematodes with O-(1-fluoro-2-halo-ethyl)(thiono)phosphoric(phosphonic) acid ester-amides | Chemistry; Metallurgy | 3 | Expired |
| US4119715A | Pesticidally active O-(1-fluoro-2-halogeno-ethyl)-thionophosphoric (phosphonic) acid esters | Chemistry; Metallurgy | 3 | Expired |
| US4296241A | Preparation of 3-(2,2-dichlorovinyl)-2,2-dimethyl-cyclopropane-1-carboxylic acid derivatives | Chemistry; Metallurgy | 3 | Expired |
| US4609646A | 2-(thi)oxo-1,3,2-oxazaphospholanes as synergizing agents for pesticides | Human Necessities | 3 | Expired |
| US4276225A | Decarbalkoxylation of carboxylic acid esters | Chemistry; Metallurgy | 3 | Expired |
| US4387060A | 2-Thi-1,3,2-oxazaphospholanes | Human Necessities | 2 | Expired |
| US4342704A | Process for the preparation of 1,1-dichloroalkenes | Chemistry; Metallurgy | 2 | Expired |
| US3950337A | O-pyrazolopyrimidine-(thiono)-phosphoric(phosphonic) acid esters | Chemistry; Metallurgy | 2 | Expired |
| US4317783A | 1-Oxo-3-methyl-2-butene phosphonic acid esters | Chemistry; Metallurgy | 2 | Expired |
| US4307033A | Preparation of 3,3-dimethyl-cyclopropane-1,1,2-tricarboxylic acid derivatives and intermediates therefor | Chemistry; Metallurgy | 2 | Expired |
| US4294762A | Preparation of .alpha.-cyano-benzyl esters | Chemistry; Metallurgy | 2 | Expired |
| US3987168A | O-Alkyl-O-[1-cyanoalkyl-5-substituted-merc apto-triazol(3)yl]-(thiono)-phosphoric(phosphonic) acid esters or ester-amides | Chemistry; Metallurgy | 1 | Expired |
| US4489013A | Preparation of .alpha.-oxo-.alpha.-(3-alkoxycarbonyl-2,2-dimethyl-cycloprop-1-yl)-metha ne-phosphonic acid esters | Chemistry; Metallurgy | 1 | Expired |
| US4237124A | Combating pests with O-ethyl-S-n-propyl-N-alkylamino-methylidene thiolphosphoric acid diester-imides | Chemistry; Metallurgy | 1 | Expired |
| US3981994A | O-Alkyl-O-[1-phenyl-5-cyanoalkylmercapto-1,2,4-triazol(3)yl]-thionop hosphoric(phosphonic) acid esters | Chemistry; Metallurgy | 1 | Expired |
| US4229444A | Pesticidal O-alkyl-O-(1,5-disubstituted-1,2,4-triazolyl-(3)-thiono-phosphoric (phosphonic) acid esters and ester-amides | Chemistry; Metallurgy | 1 | Expired |
| US3952098A | Compositions and methods of combatting insects and acarids using pyrazolo-(thiono)-phosphoric(phosphonic) acid esters | Chemistry; Metallurgy | 1 | Expired |
| US4279920A | 2,2-Dimethyl-3-(2-bromo-2-phenyl-vinyl)-cyclopropanecarboxylic acid 3-phenoxybenzyl esters and pesticidal use | Chemistry; Metallurgy | 1 | Expired |
| US4678777A | Pest-combating agents containing phosphorus-heterocyclic compounds | Chemistry; Metallurgy | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.