N.E. CHEMCAT CORPORATION
91Patents
57Active
91Granted
49Portfolio score
Filing activity: Aug 28, 1989 → Jul 29, 2022 · 12 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5876867A | Platinum skeleton alloy-supported electrocatalyst, electrode using the electrocatalyst, and process for producing the electrocatalyst | Emerging Cross-Sectional Technologies | 89 | Expired |
| US5024905A | Platinum alloy electrocatalyst | Emerging Cross-Sectional Technologies | 74 | Expired |
| US5096866A | Supported platinum alloy electrocatalyst | Emerging Cross-Sectional Technologies | 50 | Expired |
| US4970128A | Supported platinum alloy electrocatalyst | Emerging Cross-Sectional Technologies | 48 | Expired |
| US6326098A | Electrocatalyst, and electrodes, membrane-electrode assembly and solid polymer electrolyte fuel cells, using said electrocatalyst | Emerging Cross-Sectional Technologies | 37 | Expired |
| US8337791B2 | Exhaust gas purification catalyst, exhaust gas purification apparatus using the same and exhaust gas purification method | Emerging Cross-Sectional Technologies | 29 | Active |
| US5178971A | Supported platinum quaternary alloy electrocatalyst | Emerging Cross-Sectional Technologies | 28 | Expired |
| US8202819B2 | Catalyst system to be used in automobile exhaust gas purification apparatus, exhaust gas purification apparatus using the same and exhaust gas purification method | Emerging Cross-Sectional Technologies | 25 | Active |
| US6649300B2 | Electrode catalyst and electrochemical devices using the same | Emerging Cross-Sectional Technologies | 23 | Expired |
| US5306684A | Catalyst for purification of exhaust gases | Emerging Cross-Sectional Technologies | 21 | Expired |
| US5783515A | Catalyst for treating exhaust gases containing dioxines, production process for the catalyst and method of treating the exhaust gases | Performing Operations; Transporting | 20 | Expired |
| US5997830A | Method of purifying exhaust gas from internal combustion engine | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5558714A | Tank and work-holder apparatus for liquid coating for honeycomb structure | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5147842A | Exhaust gas-purifying catalyst and process for preparation thereof | Emerging Cross-Sectional Technologies | 18 | Expired |
| US5200384A | Exhaust gas-purifying catalyst excellent in heat resistance and process for preparation thereof | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5182140A | Method and apparatus for liquid coating for honeycomb structure | Emerging Cross-Sectional Technologies | 17 | Expired |
| US9011807B2 | 8-ring small pore molecular sieve as high temperature SCR catalyst | Emerging Cross-Sectional Technologies | 15 | Active |
| US5821190A | Catalyst comprising iridium, alkaline metal, alkaline earth or rare earth metal, and metal carbide or metal nitride | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5326735A | Iridium catalysts for purifying exhaust gas | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5422138A | Method and apparatus for liquid coating for honeycomb structure | Emerging Cross-Sectional Technologies | 13 | Expired |
| US7871956B2 | Cerium/zirconium-base composite oxide, method for producing the same, oxygen storage/release component using said cerium-zirconium-base composite oxide, exhaust gas purification catalyst, and exhaust gas purification method using the same | Emerging Cross-Sectional Technologies | 12 | Active |
| US9242238B2 | Mixed metal 8-ring small pore molecular sieve catalyst compositions, catalytic articles, systems, and methods | Performing Operations; Transporting | 11 | Active |
| US7906449B2 | Selective catalytic reduction type catalyst | Performing Operations; Transporting | 10 | Active |
| US8187995B2 | Cerium/zirconium-base composite oxide, method for producing the same, oxygen storage/release component using said cerium-zirconium-base composite oxide, exhaust gas purification catalyst, and exhaust gas purification method using the same | Emerging Cross-Sectional Technologies | 10 | Active |
| US8491847B2 | Apparatus of catalyst for purifying exhaust gas and method for purifying exhaust gas | Emerging Cross-Sectional Technologies | 10 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.