Holger Engdahl
10Patents
5h-index
16Co-inventors
63Inventor score
Filing activity: Mar 12, 1979 → Nov 24, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4243533A | Filters with filtrate chamber overflow partitions having plural outlets | Performing Operations; Transporting | 18 | Expired |
| US5620596A | Falling film cross filtration apparatus | Performing Operations; Transporting | 11 | Expired |
| US4264445A | Pressurized filter | Performing Operations; Transporting | 11 | Expired |
| US4762590A | Causticizing process | Emerging Cross-Sectional Technologies | 7 | Expired |
| US8002994B2 | Method and apparatus for thickening lime mud in a disc filter | Textiles; Paper | 7 | Active |
| US5618443A | Clarification of green liquor by falling film cross-flow filtration | Performing Operations; Transporting | 5 | Expired |
| US4627888A | Causticizing method | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5788813A | Clarifying and/or filtering of green liquor and an apparatus therefore | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5735331A | Method and apparatus for regulating the temperature in a chemical melt dissolving tank | Textiles; Paper | 2 | Expired |
| US4687583A | Procedure for filtering lime sludge meant to be regenerated to lime | Emerging Cross-Sectional Technologies | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.