Richard E. Freis
4Patents
4h-index
4Co-inventors
43Inventor score
Filing activity: May 12, 1975 → Nov 4, 1987
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4518459A | Methods of deinking secondary fibers | Emerging Cross-Sectional Technologies | 35 | Expired |
| US4643800A | Methods of decontaminating secondary fiber | Emerging Cross-Sectional Technologies | 26 | Expired |
| US3960781A | Isocyanate-capped surface active compositions and methods of using them | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4810328A | Method of brown stock washing | Textiles; Paper | 13 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.