Satoshi Koyama
36Patents
8h-index
52Co-inventors
74Inventor score
Filing activity: Oct 22, 1985 → Nov 22, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6631495B2 | Electronic document identification, filing, and retrieval system | Physics | 40 | Expired |
| US4668414A | Process for producing acicular particles containing an iron carbide | Chemistry; Metallurgy | 16 | Expired |
| US4842759A | Acicular process for producing particulate material | Chemistry; Metallurgy | 14 | Expired |
| US5523015A | Azeotropes of hydrogen fluoride with dichloromethane, difluoromethane and chlorofluoromethane | Chemistry; Metallurgy | 13 | Expired |
| US6716942B1 | Process for producing fluoropolymer | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5849658A | Method for preparing fluorination catalyst used to fluorinate halogenated hydrocarbons | Chemistry; Metallurgy | 10 | Expired |
| US5026605A | Coated iron carbide fine particles | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4684591A | Active materials for batteries | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5334786A | Process for preparing 1,1,1,2-tetrafluoroethane | Chemistry; Metallurgy | 8 | Expired |
| US5151206A | Acicular iron carbide particulate material and process for producing same | Chemistry; Metallurgy | 7 | Expired |
| US4770959A | Lithium-fluorinated graphite cell | Electricity | 6 | Expired |
| US5326913A | Process for preparing fluorinated compound | Chemistry; Metallurgy | 6 | Expired |
| US4840837A | Heat transfer medium | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5185483A | Process for preparing pentafluorodichloropropanes | Chemistry; Metallurgy | 4 | Expired |
| US5177274A | Process for preparing pentafluorodichloropropanes | Chemistry; Metallurgy | 4 | Expired |
| US6337299B1 | Fluorination catalyst and process for fluorinating halogenated hydrocarbon | Chemistry; Metallurgy | 3 | Expired |
| US4967025A | Purification method of carbon fluorides | Electricity | 3 | Expired |
| US6787904B2 | Semiconductor integrated circuit device | Electricity | 2 | Expired |
| US5849963A | Method for producing difluoromethane and 1,1,1,2-tetrafluoroethane | Chemistry; Metallurgy | 2 | Expired |
| US6613463B1 | Superconducting laminated oxide substrate and superconducting integrated circuit | Emerging Cross-Sectional Technologies | 2 | Expired |
| US6870018B1 | Vulcanizable flouroelastomer composition | Chemistry; Metallurgy | 2 | Expired |
| US5632811A | Method of retaining melt of oxide | Chemistry; Metallurgy | 2 | Expired |
| US5324873A | Azeotropic mixture of hydrogen fluoride and 1,1,1-trifluoro-2-chloroethane and process for purification of 1,1,1-trifluoro-2-chloroethane | Chemistry; Metallurgy | 2 | Expired |
| US5364991A | Preparation of 1,1,1,4,4,4-hexafluorobutane | Chemistry; Metallurgy | 2 | Expired |
| US5401430A | Azeotropic mixture of hydrogen fluoride and 1,1,1-trifluoro-2-chloroethane | Chemistry; Metallurgy | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.