Helmut Schmelz
18Patents
11h-index
21Co-inventors
72Inventor score
Filing activity: Feb 4, 1974 → Oct 20, 1997
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5628186A | Method and apparatus for controlled introduction of a reducing agent into a nitrogen oxide-containing exhaust gas | Emerging Cross-Sectional Technologies | 155 | Expired |
| US5643536A | Method and apparatus for metering a reagent into a flowing medium | Emerging Cross-Sectional Technologies | 62 | Expired |
| US5833932A | Catalytic converter for nitrogen oxide reduction in the exhaust gas of an internal combustion engine | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4812296A | Process utilizing catalytic material for the reduction of nitrous oxides | Emerging Cross-Sectional Technologies | 38 | Expired |
| US5546004A | Sensor for determining the course of concentration of an adsorbent substance | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5394610A | Catalytic converter and method for producing the same | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5045516A | Process for producing a catalyst for reducing nitrogen oxides in flue gases | Performing Operations; Transporting | 15 | Expired |
| US5849593A | Method for metering a reagent into a flowing medium | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4054532A | Ceramic dielectric material | Electricity | 14 | Expired |
| US4407858A | Method for producing films of sintered polycrystalline silicon | Chemistry; Metallurgy | 13 | Expired |
| US4849392A | Catalyst material for reducing the nitrogen oxides in flue gases | Performing Operations; Transporting | 13 | Expired |
| US3996168A | Ceramic electrical resistor | Electricity | 11 | Expired |
| US5225390A | Catalyst for reducing nitrogen oxides | Performing Operations; Transporting | 11 | Expired |
| US4149173A | Capacitor dielectric with internal barrier layers and a method for its production | Electricity | 11 | Expired |
| US4131903A | Capacitor dielectric with inner blocking layers and method for producing the same | Electricity | 8 | Expired |
| US4192840A | Method for producing a capacitor dielectric with inner blocking layers | Electricity | 5 | Expired |
| US4425556A | Ceramic cold conductor and method of producing the same | Electricity | 2 | Expired |
| US4361529A | Method for producing plate or tape shaped silicon crystal bodies having crystalline pillar-like structures, equivalent to columnar structures, for large surface solar cells | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.