Takehide Tsuda
14Patents
3h-index
9Co-inventors
45Inventor score
Filing activity: Feb 12, 1993 → Jun 14, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5523015A | Azeotropes of hydrogen fluoride with dichloromethane, difluoromethane and chlorofluoromethane | Chemistry; Metallurgy | 13 | Expired |
| US5846388A | Azeotropic mixture of 1,1-difluoroethane and hydrogen fluoride and production process of 1,1-difluoroethane | Chemistry; Metallurgy | 5 | Expired |
| US5744659A | Process for the preparation of difluoromethane | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6049016A | Process for producing pentafluoroethane and tetrafluorochloroethane | Chemistry; Metallurgy | 3 | Expired |
| US5401430A | Azeotropic mixture of hydrogen fluoride and 1,1,1-trifluoro-2-chloroethane | 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 |
| US6346172B1 | Process for producing difluoromethane | Chemistry; Metallurgy | 2 | Expired |
| US6375808B1 | Process for producing difluoromethane | Chemistry; Metallurgy | 2 | Expired |
| US6011185A | Process for producing pentafluoroethane and tetrafluorochloroethane | Chemistry; Metallurgy | 2 | Expired |
| US5426251A | Process for preparing 1,1,1-trifluoro-2-chloroethane and/or 1,1,1,2-tetrafluoroethane | Chemistry; Metallurgy | 1 | Expired |
| US6407296B1 | Process for producing difluoromethane | Chemistry; Metallurgy | 1 | Expired |
| US6311515A | Process for removal of hydrogen fluoride | Chemistry; Metallurgy | 0 | Expired |
| US6538165B1 | Process for producing difluoromethane and difluorochloromethane | Emerging Cross-Sectional Technologies | 0 | Expired |
| US6676809B1 | Process for removal of hydrogen fluoride | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.