Rudolf Kropp
24Patents
6h-index
43Co-inventors
69Inventor score
Filing activity: Sep 12, 1973 → Dec 10, 1998
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4008249A | Substituted pyrazoles | Chemistry; Metallurgy | 52 | Expired |
| US6069281A | Process for producing organic nitrogen compounds, special organic nitrogen compounds and mixtures of such compounds and their use as fuel and lubricant additives | Chemistry; Metallurgy | 13 | Expired |
| US4007040A | Hard copper free dental gold alloys | Chemistry; Metallurgy | 11 | Expired |
| US5879420A | Reaction products of polyisobutenes and oxides of nitrogen or mixtures of oxides of nitrogen and oxygen and their use as fuel and lubricant additives | Chemistry; Metallurgy | 10 | Expired |
| US4255191A | Gold-silver alloys with good tarnish resistance for the dental art | Chemistry; Metallurgy | 7 | Expired |
| US5296636A | Preparation of 2,4,6-trimethylbenzoic acid | Chemistry; Metallurgy | 7 | Expired |
| US5225602A | Phenylacetaldehydes and the preparation of phenylacetaldehydes | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4268445A | Preparation of bicyclic enol-ethers, and novel ethers of 2-(3-hydroxyprop-l-yl)-cycloalkanones | Chemistry; Metallurgy | 6 | Expired |
| US4011220A | Pyridazinium compounds and a process for their production | Physics | 6 | Expired |
| US4008073A | Alloy powder for the production of dental amalgam | Human Necessities | 5 | Expired |
| US5980594A | Use of reaction products of polyolefins and oxides of nitrogen or mixtures of oxides of nitrogen and oxygen as additives for fuels | Chemistry; Metallurgy | 5 | Expired |
| US5972856A | Reaction products of polyisobutenes and oxides of nitrogen or mixtures of oxides of nitrogen and oxygen and their use as fuel and lubricant additives | Chemistry; Metallurgy | 4 | Expired |
| US6005144A | Reaction products of polyisobutenes and oxides of nitrogen or mixtures of oxides of nitrogen and oxygen and their use as fuel and lubricant additives | Chemistry; Metallurgy | 4 | Expired |
| US5504236A | Preparation of .alpha.-carbonylphosphine oxides | Chemistry; Metallurgy | 3 | Expired |
| US3980633A | 4-Amino pyridazinium compounds having pharmacalogical properties | Human Necessities | 2 | Expired |
| US4870100A | Pyrethroids and their use for controlling pests | Chemistry; Metallurgy | 1 | Expired |
| US4820821A | Novel pyridazinone-imines and their physiologically tolerated addition salts with acids, their preparation and therapeutic agents containing these compounds | Chemistry; Metallurgy | 1 | Expired |
| US3975526A | Sympathicomimetic remedy inducing vasopressor effects after oral and parenteral administration | Human Necessities | 0 | Expired |
| US4324725A | Preparation of 5-(2,2-dihalovinyl)-4,4-dialkyl-tetrahydro-furan-2-ones | Chemistry; Metallurgy | 0 | Expired |
| US5679863A | Preparation of carbonylphosphine oxides | Chemistry; Metallurgy | 0 | Expired |
| US4565870A | Process for the preparation of a salt of 1-(.gamma.-halopropyl)-1,2,3,4-.beta.-carbolines | Human Necessities | 0 | Expired |
| US4320062A | Preparation of 5-(2,2,2-trihaloethyl)-dialkyl-tetrahydrofuran-2-ones | Chemistry; Metallurgy | 0 | Expired |
| US4760056A | Oximinophosphoric acid derivatives, and their use for controlling pests | Chemistry; Metallurgy | 0 | Expired |
| US4909985A | Tarnish-resistant precious-metal alloys for dentistry | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.