Frohmut Vollhardt
21Patents
6h-index
6Co-inventors
58Inventor score
Filing activity: Apr 18, 1979 → Mar 7, 1995
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4309196A | Coal gasification apparatus | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5522326A | Device for removing toxic solid and/or liquid substances from projectiles filled with chemical warfare agents | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US4314826A | Coal gasification apparatus | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4632587A | Reactor construction | Performing Operations; Transporting | 10 | Expired |
| US4207065A | Device for heating open melting baths, such as galvanizing baths, enameling baths, lead coating baths, metallic baths, glass baths, and the like | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US4909162A | Installation for low-temperature carbonization of waste and impure materials | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4509463A | Upright apparatus for cooling high pressure gases containing a high dust content | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US4831969A | Process and a device for cleaning inner or outer walls of vertically extending or inverted tubes of heat exchangers | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US4768445A | Waste incinerator construction | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US5099916A | Cooler for particle-laden gases | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4325693A | Device for heating open melting baths | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US5586995A | Filter for separating pollutants from flue gases | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4743432A | Vertical reactor for the generation of methanol | Performing Operations; Transporting | 3 | Expired |
| US4840145A | Process and a device for cleaning inner or outer walls of vertically extending or inverted tubes of heat exchangers | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US5198004A | Activated carbon filter for removing toxic substances, e.g., dioxins and furans, from flue gases prior to entry into the smokestack | Performing Operations; Transporting | 3 | Expired |
| US5458859A | Device for removing heavy metals and slags from synthesis gas produced from refinery wastes | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4522155A | Method and apparatus for controlling the heating effect of high temperature gases to be supplied to a heat exchanger | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US4734264A | Catalytic reactor for the production of methanol, ammonia, synthesis gas and higher alcohols | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4815399A | Incinerator construction | Emerging Cross-Sectional Technologies | 1 | Expired |
| US4913064A | Device for incinerating waste material | Mechanical Engineering; Lighting; Heating | 0 | Expired |
| US4278451A | Apparatus for extracting granular or finely divided solid materials from a gas under pressure | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.