Douglas W. Stephan
19Patents
8h-index
37Co-inventors
72Inventor score
Filing activity: Dec 12, 1995 → Jun 7, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5965677A | Supported phosphinimine-Cp catalysts | Emerging Cross-Sectional Technologies | 94 | Expired |
| US6063879A | High temperature solution polymerization process with phosphinimine cyclopentadienyl metal (GRP IV) complex | Chemistry; Metallurgy | 55 | Expired |
| US6342463B1 | Polymerization catalyst having a phosphinimine ligand | Chemistry; Metallurgy | 44 | Expired |
| US6239061A | Aluminum-phosphinimine complexes as catalysts for the (co)polymerization of ethylene | Chemistry; Metallurgy | 18 | Expired |
| US6239238A | Bis-phosphinimine catalyst | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6355744B1 | Cyclopentadienyl/phosphinimine catalyst with one and only one activatable ligand | Emerging Cross-Sectional Technologies | 14 | Expired |
| US6649558B2 | Bis-phosphinimine catalyst | Emerging Cross-Sectional Technologies | 9 | Expired |
| US6440890B1 | Hydrocarbyl phosphinimine/cyclopentadienyl complexes of group IV metals and preparation thereof | Emerging Cross-Sectional Technologies | 8 | Expired |
| US9156929B2 | Bis(2-indenyl) metallocene complex | Chemistry; Metallurgy | 5 | Active |
| US8299284B2 | Frustrated lewis pair compositions | Chemistry; Metallurgy | 5 | Active |
| US10005858B2 | Boron-bridged 2-indenyl metallocene complexes for olefin polymerization | Chemistry; Metallurgy | 2 | Active |
| US9920086B2 | Ruthenium-based complexes, their preparation and use as catalysts | Chemistry; Metallurgy | 2 | Active |
| US9738671B2 | Cyclic bent allene metal complexes | Chemistry; Metallurgy | 0 | Active |
| US10253055B2 | Ruthenium-based triazole carbene complexes | Chemistry; Metallurgy | 0 | Active |
| US5726335A | Zirconium compounds, their preparation and their use as catalysts | Chemistry; Metallurgy | 0 | Expired |
| US9701703B2 | Transition metal complexes, their preparation and use | Chemistry; Metallurgy | 0 | Active |
| US11312677B2 | Synthesis of building blocks and feedstocks for manufacturing renewable polymers | Emerging Cross-Sectional Technologies | 0 | Active |
| US8642812B2 | Frustrated Lewis pair compositions | Chemistry; Metallurgy | 0 | Active |
| US9828401B2 | Ruthenium-based complex catalysts | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.