Inventor · Nashua, NH, US

Oscar Luthi

32Patents
12h-index
11Co-inventors
78Inventor score

Filing activity: Jan 24, 1977 → Feb 8, 1996

Most-cited inventions

PatentTitleAreaCited byStatus
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.