Hirokazu Aoyama
73Patents
12h-index
85Co-inventors
87Inventor score
Filing activity: May 3, 1983 → Jun 30, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5679875A | Method for manufacturing 1,1,1,2,3-pentafluoropropene 1,1,1,2,3-pentafluoropropane | Performing Operations; Transporting | 145 | Expired |
| US6060628A | Manufacturing method for 1,1,1,3,3-pentafluoropropane | Chemistry; Metallurgy | 85 | 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 |
| US4427803A | Mold release composition | Chemistry; Metallurgy | 21 | Expired |
| US6018084A | Process for producing 1,1,1,3,3-pentafluoropropane | Chemistry; Metallurgy | 16 | Expired |
| US4985168A | Working fluids | Chemistry; Metallurgy | 15 | Expired |
| US6908724B2 | Fluorine-containing polymer having acid-reactive group and chemically amplifying type photoresist composition prepared from same | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5516951A | Process for preparing 1,1,1,4,4,4-hexafluoro-2-butene and 1,1,1,4,4,4-hexafluorobutane | Chemistry; Metallurgy | 14 | Expired |
| US5629461A | Method of producing 1,1,2,2,3-pentafluoropropane | Chemistry; Metallurgy | 13 | Expired |
| US5667594A | Cleaning method with solvent | Chemistry; Metallurgy | 12 | Expired |
| US4563493A | Omega-perfluoroalkyl-1,2-epoxyalkane copolymer and use thereof | Chemistry; Metallurgy | 12 | Expired |
| US4840675A | Mold release composition | Chemistry; Metallurgy | 12 | Expired |
| US5728902A | Method for manufacturing 1,1,1,3,3-pentafluoropropene | Chemistry; Metallurgy | 11 | Expired |
| US5696306A | Decomposition inhibitor for hydrogen- and fluorine-containing halogenated hydrocarbons and method of inhibiting decomposition using same | Chemistry; Metallurgy | 11 | Expired |
| US4835300A | Fluorine containing urethane compounds | Chemistry; Metallurgy | 10 | 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 |
| US5599783A | Cleaning solvent composition and a method for cleaning or drying articles | 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 |
| US5689019A | Manufacturing method for 1,1,1,2,3,3,3-heptafluoropropane | Chemistry; Metallurgy | 7 | Expired |
| US4728707A | Water- and oil-repellent | Textiles; Paper | 6 | 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 |
| US5326913A | Process for preparing fluorinated compound | Chemistry; Metallurgy | 6 | Expired |
| US5532418A | Method of producing 1,1,1,2,3,3,-hexafluoropropane and tetrafluorochloropropene | Chemistry; Metallurgy | 5 | Expired |
| US5424002A | Solvent composition comprising mixture of polyfluoroalkane and lower alcohol | Chemistry; Metallurgy | 5 | Expired |
| US5177274A | Process for preparing pentafluorodichloropropanes | Chemistry; Metallurgy | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.