Oscar Luthi
32Patents
12h-index
11Co-inventors
78Inventor score
Filing activity: Jan 24, 1977 → Feb 8, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4242808A | Paper web drying system and process | Emerging Cross-Sectional Technologies | 33 | Expired |
| US5046338A | Multiphase pulp washer | Textiles; Paper | 23 | Expired |
| US4827741A | Pulp washer discharging a pulp slurry at a controlled consistency | Textiles; Paper | 20 | Expired |
| US4364185A | System for drying wet, porous webs | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US4085003A | Pressure pulp washer with pivoted baffle | Textiles; Paper | 17 | Expired |
| US4338192A | Clarifier bubble generation and distribution nozzle | Emerging Cross-Sectional Technologies | 16 | Expired |
| US5667642A | Pulp slurry-handling press roll and twin and single roll slurry handling presses | Textiles; Paper | 15 | Expired |
| US4297794A | Paper sheet dryer | Textiles; Paper | 15 | Expired |
| US4770604A | Pulp centrifugal pump | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US5503737A | Air inflow restrictor for disc filters | Performing Operations; Transporting | 13 | Expired |
| US4906364A | Filter deck assembly sliding seal | Performing Operations; Transporting | 13 | Expired |
| US4217170A | Pulp washer discharging a low consistency pulp slurry | Textiles; Paper | 12 | Expired |
| US5683582A | Air inflow restrictor for vacuum filters | Performing Operations; Transporting | 11 | Expired |
| US4099268A | Mixing device | Performing Operations; Transporting | 10 | Expired |
| US4321140A | Disk press | Performing Operations; Transporting | 10 | Expired |
| US4265740A | Centrifugal separator | Performing Operations; Transporting | 10 | Expired |
| US5307939A | Screening apparatus for papermaking pulp | Performing Operations; Transporting | 9 | Expired |
| US4808265A | Method of washing pulp in a pressure pulp washer adding two washing liquids | Textiles; Paper | 9 | Expired |
| US4581104A | Method of reducing the lignin in wood pulp with oxygen gas recirculation | Performing Operations; Transporting | 7 | Expired |
| US4894121A | Pressure pulp washer | Textiles; Paper | 7 | Expired |
| US4251927A | Paper drier drum | Textiles; Paper | 7 | Expired |
| US5470471A | Anti-rewet deck for press rolls | Performing Operations; Transporting | 6 | Expired |
| US4480392A | Conduction dryer for flaked or fluffed material | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US4515693A | Fiberglass-reinforced solid plastic drum | Performing Operations; Transporting | 6 | Expired |
| US4098642A | Pressure pulp washer with inlet pivot | Textiles; Paper | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.