Michael J. Elder
33Patents
18h-index
37Co-inventors
81Inventor score
Filing activity: Oct 10, 1989 → Sep 10, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5387568A | Preparation of metallocene catalysts for polymerization of olefins | Emerging Cross-Sectional Technologies | 184 | Expired |
| US5155080A | Process and catalyst for producing syndiotactic polyolefins | Emerging Cross-Sectional Technologies | 171 | Expired |
| US5416228A | Process and catalyst for producing isotactic polyolefins | Chemistry; Metallurgy | 103 | Expired |
| US5225500A | Process and catalyst for producing syndiotactic polyolefins | Emerging Cross-Sectional Technologies | 100 | Expired |
| US5663249A | Catalyst and process for polymerization of olefins | Emerging Cross-Sectional Technologies | 73 | Expired |
| US5561092A | Metallocene catalysts with lewis acids and aluminum alkyls | Emerging Cross-Sectional Technologies | 69 | Expired |
| US6635779B1 | Metallocene compounds, process for their preparation and their use in catalytic systems for the polymerization of olefins | Emerging Cross-Sectional Technologies | 66 | Expired |
| US5395810A | Method of making a homogeneous-heterogenous catalyst system for olefin polymerization | Chemistry; Metallurgy | 63 | Expired |
| US6444833B1 | Metallocene compounds, process for their preparation and their use in catalytic systems for the polymerization of olefins | Emerging Cross-Sectional Technologies | 57 | Expired |
| US5519100A | Addition of aluminum alkyl for improved metallocene catalyst | Chemistry; Metallurgy | 47 | Expired |
| US5763549A | Cationic metallocene catalysts based on organoaluminum anions | Chemistry; Metallurgy | 45 | Expired |
| US5614457A | Catalyst system using aluminum alkyl with ion-pair metallocene catalysts | Chemistry; Metallurgy | 43 | Expired |
| US5807939A | Polymerization of alpha-olefins with cationic metallocene catalysts based on organoaluminum anions | Chemistry; Metallurgy | 32 | Expired |
| US7452949B2 | Organometallic transition metal compound, biscyclopentadienyl ligand system, catalyst system and preparation of polyolefins | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5883202A | Process for olefin polymerization using metallocene catalysts with Lewis acids and aluminum alkyls | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5242876A | Homogeneous-heterogeneous catalyst system for polyolefins | General | 23 | Revoked |
| US7141637B2 | Metallocene compounds and process for the preparation of propylene polymers | Emerging Cross-Sectional Technologies | 21 | Expired |
| US7238818B2 | Heterocyclic metallocenes and polymerization catalysts | Chemistry; Metallurgy | 20 | Expired |
| US7544749B2 | Polymerization catalysts, organic transition metal compounds, process for preparing polyolefins and polyolefins | Chemistry; Metallurgy | 15 | Expired |
| US5688735A | Method for controlling the melting points and molecular weights of syndiotactic polyolefins using metallocene catalyst systems | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6262199A | Process and catalyst for producing isotactic polyolefins | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5710222A | Method for controlling the melting points and molecular weights of syndiotactic polyolefins using metallocene catalyst systems | Emerging Cross-Sectional Technologies | 10 | Expired |
| US9045569B2 | Process of making modified metallocene catalyst, catalyst produced and use thereof | Emerging Cross-Sectional Technologies | 9 | Active |
| US7492946B2 | System, method and computer program for an integrated digital workflow for processing a paper form | Physics | 8 | Expired |
| US7504354B2 | Organometallic transition metal compound, biscyclopentadienyl ligand system, catalyst system and process for preparing polyolefins | Chemistry; Metallurgy | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.