Johnson Matthey PLC
🏢 View company profile →182Patents
126Active
182Granted
55Portfolio score
Filing activity: Feb 28, 1983 → Sep 13, 2019 · 52 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7375049B2 | Catalyst | Chemistry; Metallurgy | 86 | Expired |
| US5021409A | Antiviral cyclic polyamines | Human Necessities | 79 | Expired |
| US8173572B2 | Metal oxide sols | Performing Operations; Transporting | 53 | Active |
| US6969693B2 | Immobilised ionic liquids | Performing Operations; Transporting | 33 | Expired |
| US7786180B2 | Methanol synthesis | Emerging Cross-Sectional Technologies | 31 | Expired |
| US9278338B2 | Catalyst manufacturing method | Emerging Cross-Sectional Technologies | 31 | Active |
| US8557728B2 | Shaped heterogeneous catalysts | Emerging Cross-Sectional Technologies | 25 | Active |
| US9272264B2 | Catalyst manufacturing method | Emerging Cross-Sectional Technologies | 24 | Active |
| US6633625B2 | Density profiler for measuring density profile of a medium and method and apparatus using same | Physics | 20 | Expired |
| US5612478A | Process for preparing 1,1'-[1,4-phenylenebis-(methylene)]-bis-1,4,8,11-tetraazacyclotetradecan e | Chemistry; Metallurgy | 19 | Expired |
| US6706928B2 | Aldol condensation reaction and catalyst therefor | Chemistry; Metallurgy | 18 | Expired |
| US7591944B2 | Sulphided ion exchange resins | Chemistry; Metallurgy | 18 | Expired |
| US7087652B2 | Process for the production of hydrocarbons | Chemistry; Metallurgy | 17 | Expired |
| US9216903B2 | Conversion of hydrocarbons to carbon dioxide and electrical power | Emerging Cross-Sectional Technologies | 17 | Active |
| US5606053A | Process for preparing 1,1'-[1,4-phenylenebis-(methylene)]-bis-1,4,8,11-tetraazacyclotetradecan e | Chemistry; Metallurgy | 17 | Expired |
| US4493738A | Brazing alloy composition | Performing Operations; Transporting | 16 | Expired |
| US6927190B2 | Catalysts with high cobalt surface area | Chemistry; Metallurgy | 16 | Expired |
| US5939028A | Combatting air pollution | Emerging Cross-Sectional Technologies | 14 | Expired |
| US6525104B2 | Steam reforming | Chemistry; Metallurgy | 14 | Expired |
| US8747806B2 | Hydrogen process | Emerging Cross-Sectional Technologies | 13 | Active |
| US7144923B2 | Methanol synthesis | Performing Operations; Transporting | 13 | Expired |
| US7731935B2 | Steam reforming | Mechanical Engineering; Lighting; Heating | 13 | Active |
| US7727509B2 | Metal passivation in a heat exchange reformer | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5608061A | Process for preparing 1,4,8,11-tetraazacyclotetradecane | Chemistry; Metallurgy | 12 | Expired |
| US4550743A | Bursting disc orientation device | Emerging Cross-Sectional Technologies | 11 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.