Bela Stefko
25Patents
4h-index
105Co-inventors
66Inventor score
Filing activity: Dec 16, 1974 → Mar 4, 1999
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6348190B1 | Pharmaceutical compositions with antimicrobial activity | Human Necessities | 10 | Expired |
| US4816587A | Process for the preparation of 2-halogenated ergoline derivatives | Chemistry; Metallurgy | 9 | Expired |
| US4334910A | Plant-protective and pest-control agent | Human Necessities | 8 | Expired |
| US3938259A | Process for continuous drying of chemical products by milling-fluidisation | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US4780537A | Pyrimidine derivatives and process preparing the same | Chemistry; Metallurgy | 4 | Expired |
| US6458774B1 | Compositions containing hyaluronic acid associates and a process for preparing same | Human Necessities | 4 | Expired |
| US4681887A | Pharmaceutical compositions with a neuroleptic action and process for preparing same | Chemistry; Metallurgy | 4 | Expired |
| US4831194A | Process for the preparation of nitrodiaryl sulfoxides | Chemistry; Metallurgy | 3 | Expired |
| US5312622A | Acaricidal compositions and process for preparing same | Chemistry; Metallurgy | 2 | Expired |
| US5137605A | Process for dehydration of condensation reaction mixtures obtained by azeotropic distillation | Chemistry; Metallurgy | 2 | Expired |
| US4697017A | Process for the preparation of 2-bromo-.alpha.-ergocryptine | Human Necessities | 2 | Expired |
| US4243660A | Composite insect attractant for male cabbage moths and a process for preparing its active agents | Chemistry; Metallurgy | 2 | Expired |
| US5472950A | Compositions containing cobalt hyaluronic acid complex | Human Necessities | 1 | Expired |
| US4985463A | Aminodiaryl sulfoxide derivatives, process for their preparation and pharmaceutical and pesticidal compositions containing them | Chemistry; Metallurgy | 1 | Expired |
| US4657859A | Process for the treatment of fermentation broth containing vitamin B.sub.12 and other corrinoids and for the preparation of vitamin B.sub.12 concentrates | Emerging Cross-Sectional Technologies | 1 | Expired |
| US4839362A | Eburnamenine derivatives, pharmaceutical compositions and methods employing them and processes for their preparation | Human Necessities | 1 | Expired |
| US5218119A | Process for preparing the octahydro-indolo[2,3-a] quinolizine diester derivatives | Chemistry; Metallurgy | 1 | Expired |
| US4710323A | Nitrodiaryl sulfoxide derivatives, process for their preparation and pharmaceutical and pesticidal compositions containing them as active ingredient | Chemistry; Metallurgy | 0 | Expired |
| US4960888A | Preparation of 6-amino-1,2-dihydro-1-hydroxy-2-imino-4-piperidinopyrimidine compounds | Chemistry; Metallurgy | 0 | Expired |
| US4956007A | Nitraminodiaryl sulfoxide derivatives, process for their preparation and pharmaceutical and pesticidal compositions containing them | Chemistry; Metallurgy | 0 | Expired |
| US4735946A | Eburnane derivatives, process for their preparation and pharmaceutical compositions containing them | Human Necessities | 0 | Expired |
| US4758666A | Process for the preparation of an apovincaminol derivative | Chemistry; Metallurgy | 0 | Expired |
| US4810709A | Nintrovincaminic acid derivatives having pharmaceutical utility | Human Necessities | 0 | Expired |
| US5122607A | Racemic and optically active octahydro-indolo(2,3-a) tetrahydropyranyl (2,3-c) quinolizine diester derivatives and process for preparing the same | Chemistry; Metallurgy | 0 | Expired |
| US4859682A | 2-Halogenated-8- and 1,8-substituted ergolenes | Human Necessities | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.