Junichi Imuta
34Patents
16h-index
47Co-inventors
81Inventor score
Filing activity: Dec 28, 1987 → May 12, 2008
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5504172A | Propylene polymer, propylene copolymer, and propylene elastomer prepared using novel bridged indenyl containing metallocenes | Emerging Cross-Sectional Technologies | 266 | Expired |
| US5753769A | Process for preparing propylene polymer composition and propylene polymer composition | Chemistry; Metallurgy | 51 | Expired |
| US5658997A | Process for polymerizing propylene by using a novel metallocene catalyst | Emerging Cross-Sectional Technologies | 46 | Expired |
| US5959046A | Processes for producing propylene polymer utilizing bis (1-(4-isopropyl-7-methyl-indenyl) zirconium halide-base catalyst components | Emerging Cross-Sectional Technologies | 46 | Expired |
| US5710223A | Process for polymerizing propylene by using a novel metallocene catalyst | Emerging Cross-Sectional Technologies | 42 | Expired |
| US5629254A | Substituted indenyl ring containing metallocene catalyst for propylene polymerization process | Emerging Cross-Sectional Technologies | 41 | Expired |
| US6346070B1 | Catalyst for polyester production, process for producing polyester using the catalyst, polyester obtained by the process, and uses of the polyester | Chemistry; Metallurgy | 39 | Expired |
| US5767033A | Transition metal compound and olefin polymerization catalyst component comprising said compound | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5723640A | Transition metal compound having indenyl-containing metallocene | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5739366A | Transition metal compound containing substituted indenyl rings | Emerging Cross-Sectional Technologies | 36 | Expired |
| US5854354A | Process for preparing propylene polymer composition and propylene polymer composition | Emerging Cross-Sectional Technologies | 31 | Expired |
| US6451959B1 | Catalyst for polyester production, process for producing polyester using the catalyst, polyester obtained by the process, and uses of the polyester | Chemistry; Metallurgy | 28 | Expired |
| US7393907B2 | Polar group-containing olefin copolymer, process for preparing the same, thermoplastic resin composition containing the copolymer, and uses thereof | Chemistry; Metallurgy | 25 | Expired |
| US6004897A | Olefin polymerization catalyst, process for preparing olefin polymer, and olefin polymer | Emerging Cross-Sectional Technologies | 25 | Expired |
| US6156844A | Propylene polymer compositions containing a propylene homo- or co-polymer obtained using a bridged metallocene catalyst and another propylene homo- or co-polymer | Chemistry; Metallurgy | 23 | Expired |
| US5616663A | Transition metal compound, olefin polymerization catalyst component comprising the transition metal compound, olefin polymerization catalyst comprising the olefin polymerization catalyst component, and process for olefin polymerization | Chemistry; Metallurgy | 20 | Expired |
| US6255419A | Olefin polymerization catalyst and process for producing olefin polymers | Chemistry; Metallurgy | 14 | Expired |
| US5409874A | Catalyst for olefin polymerization, process for the polymerization of olefin, and transition metal compound employable for the catalyst | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5795838A | Olefin polymerization catalyst and process for olefin polymerization | Emerging Cross-Sectional Technologies | 10 | Expired |
| US7714087B2 | Polar group-containing olefin copolymer, process for preparing the same, thermoplastic resin composition containing the copolymer, and uses thereof | Chemistry; Metallurgy | 7 | Active |
| US5859272A | Transition metal compound, olefin polymerization catalyst component comprising the transition metal compound, olefin polymerization catalyst comprising the olefin polymerization catalyst component, and process for olefin polymerization | Chemistry; Metallurgy | 6 | Expired |
| US5969049A | Process for preparing propylene polymer composition and propylene polymer composition | Chemistry; Metallurgy | 5 | Expired |
| US4973703A | "Process for purification of N-cyano-N'-methyl-N""-(2-((5-methyl-1Himidazol-4-yl)methylthio)ethyl)guan idine" | Chemistry; Metallurgy | 5 | Expired |
| US4886910A | Cyanoguanidine derivative and process for preparation thereof | Chemistry; Metallurgy | 4 | Expired |
| USRE40571E1 | Catalyst for polyester production, process for producing polyester using the catalyst, polyester obtained by the process, and uses of the polyester | General | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.