Tatsuo Nakada
26Patents
9h-index
20Co-inventors
71Inventor score
Filing activity: Jun 9, 1988 → Feb 11, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6472573B1 | Process for producing 1,1,1,3,3-pentafluoropropane | Chemistry; Metallurgy | 65 | Expired |
| US5714655A | Process of manufacturing 1,1,1,3,3-pentafluoropropane, process of manufacturing 2,2,3-trichloro 1,1,1,3,3-pentafluoropropane and process of manufacturing 2,3,3-trichloro-1,1,1-trifluoropropene | Chemistry; Metallurgy | 43 | Expired |
| US6403847B1 | Process for producing 1,1,1,3,3-pentafluoro-propane and/or 1-chloro-3,3,3-trifluoropropene | Chemistry; Metallurgy | 35 | Expired |
| US7183448B2 | Azeotropic composition, comprising 1, 1, 1, 3,3-pentafluoropropane and 1, 1, 1-trifluoro-3-chloro-2-propene, method of separation and purification of the same, and process for producing 1, 1, 1,3,3-pentafloropropane and 1, 1, 1-trifluoro-3-chloro-2-propene | Chemistry; Metallurgy | 26 | Expired |
| US6018084A | Process for producing 1,1,1,3,3-pentafluoropropane | Chemistry; Metallurgy | 16 | Expired |
| US5304654A | Fluorine-containing nitroimidazole compounds | Chemistry; Metallurgy | 16 | Expired |
| US4927941A | Fluorine-containing nitroazole derivatives and radiosensitizer comprising the same | Chemistry; Metallurgy | 15 | Expired |
| US6328907A | Azeotrope comprising pentafluoropropane and hydrogen fluoride and method for separating and purifying pentafluoropropane | Chemistry; Metallurgy | 14 | Expired |
| US5659093A | Method of producing 1,1,1,3,3-pentafluoropropane, a method of producing 1,1,1,3,3-pentafluoro-2-halogeno-3-chloropropane, and a method of producing 1,1,1,2,3,3-hexachloropropene | Chemistry; Metallurgy | 9 | Expired |
| US5714654A | Method of Producing 1,1,1,3,3-pentafluoropropane and/or 1,1,3,3,3-pentafluoropropene | Chemistry; Metallurgy | 8 | Expired |
| US5608128A | Production methods of 1,1,1,4,4,4-hexsfluoro-2-butene compounds and 1,1,1,4,4,4,-hexafluorobutane | Chemistry; Metallurgy | 6 | Expired |
| US6191328A | Method for 1, 1, 1, 3, 3-pentafluoropropane | Chemistry; Metallurgy | 6 | Expired |
| US5532418A | Method of producing 1,1,1,2,3,3,-hexafluoropropane and tetrafluorochloropropene | Chemistry; Metallurgy | 5 | Expired |
| US6521802B1 | Process for preparing fluorine-containing halogenated hydrocarbon compound | Chemistry; Metallurgy | 3 | Expired |
| US6863780B2 | Process of separating/purifying pentafluoropropane | Chemistry; Metallurgy | 3 | Expired |
| US6316682A | Process for preparing 1,1,1,3,3-pentafluoropropane | Emerging Cross-Sectional Technologies | 3 | Expired |
| US5364991A | Preparation of 1,1,1,4,4,4-hexafluorobutane | Chemistry; Metallurgy | 2 | Expired |
| US6291728A | Process for producing 1,1,1,3,3-pentafluoropropane | Chemistry; Metallurgy | 2 | Expired |
| US5763705A | Method of producing 1,1,1,3,3-pentafluoropropane, a method of producing 1,1,1,3,3-pentafluoro-2-halogeno-3-chloropropane, and a method of producing 1,1,1,2,3,3-hexachloropropene | Chemistry; Metallurgy | 1 | Expired |
| US5688379A | Process for preparing perfluoroalkyl bromides | Chemistry; Metallurgy | 1 | Expired |
| US5763703A | Manufacturing method for hexafluorocylobutene and hexafluorocyclobutane | Chemistry; Metallurgy | 1 | Expired |
| US6329560A | Method for producing hydrogen-containing fluorinated hydrocarbon | Emerging Cross-Sectional Technologies | 1 | Expired |
| US5789632A | Process of purifying 1,1,1,3,3,-pentafluoro-2,3 dichloropropane | Chemistry; Metallurgy | 1 | Expired |
| US6846963B2 | Process for producing 1,1,1,3,3-pentafluoropropane | Chemistry; Metallurgy | 1 | Expired |
| US7094934B2 | Production process of hydrofluorocarbons | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.