John G. Speakman
15Patents
8h-index
8Co-inventors
65Inventor score
Filing activity: Dec 1, 1976 → Apr 24, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5283278A | Gas phase olefin polymerization process | Emerging Cross-Sectional Technologies | 73 | Expired |
| US4333851A | Olefin polymerization catalyst, process and polyolefin product | Chemistry; Metallurgy | 25 | Expired |
| US4097409A | Preparation of titanium containing catalyst on magnesium support material | Chemistry; Metallurgy | 17 | Expired |
| US4879359A | Process for polymerising ethylene using a chromium oxide catalyst | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4517345A | Polymerization process | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6677267B2 | Polymerization catalysts | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6372867B1 | Process for the gas phase polymerization of olefins | Emerging Cross-Sectional Technologies | 9 | Expired |
| US6462152B1 | Polymerization process | Emerging Cross-Sectional Technologies | 9 | Expired |
| US5166279A | Process for the gas phase (co-)polymerization of ethylene | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5165998A | Prepolymers of olefins containing a chromiumoxide and a granular refractory oxide support | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4910271A | Process for the polymerisation of ethylene or the copolymerisation of ethylene and alpha-olefins in a fluidised bed in the presence of a chromium based catalyst | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5336738A | Kill-gas introduction to a fluidized bed reactor containing chromium oxide catalyst | Chemistry; Metallurgy | 3 | Expired |
| US6492293B1 | Polymerisation catalyst | Chemistry; Metallurgy | 2 | Expired |
| USRE35346E | Process for the polymerisation of ethylene or the copolymerisation of ethylene and alpha-olefins in a fluidised bed in the presence of a chromium based catalyst | General | 1 | Expired |
| USRE35324E | Prepolymers of olefins containing a chromium oxide and a granular refractory oxide support | General | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.