John Happel
5Patents
5h-index
2Co-inventors
49Inventor score
Filing activity: Nov 14, 1977 → Jun 23, 1993
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4491639A | Methods of making high activity transition metal catalysts | Performing Operations; Transporting | 45 | Expired |
| US5434330A | Process and apparatus for separation of constituents of gases using gas hydrates | Chemistry; Metallurgy | 35 | Expired |
| US4151191A | Sulfur resistant molybdenum catalysts for methanation | Chemistry; Metallurgy | 18 | Expired |
| US4320030A | Process for making high activity transition metal catalysts | Chemistry; Metallurgy | 17 | Expired |
| US4260553A | Alumina-containing methanation catalysts | Chemistry; Metallurgy | 12 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.