Stephen John Brown
47Patents
15h-index
73Co-inventors
84Inventor score
Filing activity: Jan 1, 1986 → May 6, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6984695B2 | Heterogeneous/homogeneous copolymer | Emerging Cross-Sectional Technologies | 113 | Expired |
| US5589555A | Control of a solution process for polymerization of ethylene | Chemistry; Metallurgy | 105 | Expired |
| US6372864B1 | Dual reactor polyethylene process using a phosphinimine catalyst | Emerging Cross-Sectional Technologies | 75 | Expired |
| US6277931A | Dual reactor ethylene polymerization process | Chemistry; Metallurgy | 63 | Expired |
| US6777509B2 | Solution polymerization process | Chemistry; Metallurgy | 60 | 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 |
| US6114481A | Catalyst having a ketimide ligand | Emerging Cross-Sectional Technologies | 36 | Expired |
| US8585146B1 | Aircraft seat | Emerging Cross-Sectional Technologies | 31 | Active |
| US5519098A | Activation of catalyst in ethylene polymerization at high temperatures | Chemistry; Metallurgy | 23 | Expired |
| US6642313B1 | Multimodal polyolefin pipe | Chemistry; Metallurgy | 23 | Expired |
| US6147172A | Phosphinimine/heteroatom catalyst component | Emerging Cross-Sectional Technologies | 19 | Expired |
| US9963529B1 | Multi reactor solution polymerization | Chemistry; Metallurgy | 17 | Active |
| US6180730A | Catalyst deactivation | Chemistry; Metallurgy | 16 | 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 |
| US8101693B2 | Multi reactor process | Chemistry; Metallurgy | 14 | Active |
| US6234950A | Nitrogen substituted phosphinimine ligand | Emerging Cross-Sectional Technologies | 12 | Expired |
| US8431657B2 | Catalyst activation in a dual reactor process | Chemistry; Metallurgy | 9 | Active |
| US10538654B2 | Multi reactor solution polymerization, polyethylene and polyethylene film | Chemistry; Metallurgy | 9 | Active |
| 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 |
| US4780559A | Process for preparing organic fluorides | Chemistry; Metallurgy | 8 | Expired |
| US6486276B1 | Process to prepare ethylene propylene elastomer | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6420300B1 | Catalyst having a ketimide ligand | Emerging Cross-Sectional Technologies | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.