Dietmar Bielefeldt
46Patents
9h-index
65Co-inventors
78Inventor score
Filing activity: Sep 3, 1987 → Dec 12, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5496866A | C.sub.3 to C.sub.5 polyfluoroalkanes propellants | Emerging Cross-Sectional Technologies | 42 | Expired |
| US5171901A | Process for the preparation of 1,1,1,3,3,3-hexafluoropropane and 2-chloro-1,1,1,3,3,3-hexafluoropropane | Chemistry; Metallurgy | 29 | Expired |
| US4931482A | Use of 1,1,1,4,4,4-hexaefluorobutane as a blowing and insulating gas for the production of foam plastics | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4902839A | Process for preparing fluorinated C.sub.4 to C.sub.6 hydrocarbons and novel cyclic fluorinated hydrocarbons and their use as propellant gas and working fluid for heat pump systems | Chemistry; Metallurgy | 19 | Expired |
| US5463150A | Process for preparing hexafluorobutene | Chemistry; Metallurgy | 18 | Expired |
| US4954666A | Process for preparing fluorinated C.sub.4 to C.sub.6 hydrocarbons and novel cyclic fluorinated hydrocarbons and their use as propellant gas and working fluid for heat pump systems | Chemistry; Metallurgy | 17 | Expired |
| US4820847A | Process for the preparation of 4-substituted 1-aryl-5-amino-pyrazoles | Chemistry; Metallurgy | 13 | Expired |
| US5646196A | C.sub.3 to C.sub.5 polyfluorcalkanes propellants | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6414192B1 | Process for preparing 4-aminodiphenylamine | Chemistry; Metallurgy | 10 | Expired |
| US5072030A | Process for the fluorination of acrylic acid and derivatives thereof and novel fluorinated esters of 2,3-difluoropropionic acid | Chemistry; Metallurgy | 9 | Expired |
| US6107336A | Dihydrofuran carboxamides | Chemistry; Metallurgy | 8 | Expired |
| US6054473A | 1,3-dimethyl-5-fluoro-pyrazole-4-carboxamide derivatives, their preparation and their use as microbicides | Human Necessities | 7 | Expired |
| US5087775A | Process for the preparation of partially fluorinated alcohols | Chemistry; Metallurgy | 7 | Expired |
| US5210340A | Preparation of polyfluorobutenes | Chemistry; Metallurgy | 7 | Expired |
| US5672787A | Process for preparing 1,1,1,4,4,4-hexafluorobutane in the liquid phase | Chemistry; Metallurgy | 7 | Expired |
| US5354884A | Optically active N-.alpha.-fluoroacryloylamino acid derivatives for the resolution of racemates | Chemistry; Metallurgy | 6 | Expired |
| US5496867A | C.sub.3 to C.sub.5 polyfluoroalkanes propellants | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6265430A | 3-thiocarbamoylpyrazole derivatives as pesticides | Chemistry; Metallurgy | 5 | Expired |
| US5292924A | Optically active N-.alpha.-fluoroacryloylamino acid polymers for the resolution of racemates | Chemistry; Metallurgy | 5 | Expired |
| US5059711A | Process for the preparation of trifluoromethanesulphonic acid | Chemistry; Metallurgy | 4 | Expired |
| US5146019A | Preparation of polyfluorobutenes | Chemistry; Metallurgy | 4 | Expired |
| US5994273A | Herbicidal or fungicidal sulphonylaminocarbonyltriazolinones with halogenated alk(en)ylthio substituents | Chemistry; Metallurgy | 4 | Expired |
| US5523497A | Process for preparing hexafluorochlorobutenes | Chemistry; Metallurgy | 4 | Expired |
| US5315047A | Process for the preparation of hexafluorobutane, and intermediates thereby obtainable | Chemistry; Metallurgy | 4 | Expired |
| US5283378A | Process for the dechlorination and/or debromination of fluorine-and chlorine- and/or bromine-containing aromatic compounds | Chemistry; Metallurgy | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.