Andritz-Ahlstrom Oy
18Patents
0Active
18Granted
31Portfolio score
Filing activity: Apr 18, 1996 → Oct 22, 2003
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6306253A | Acid treatment of pulp at high temperature prior to chlorine dioxide bleaching | Textiles; Paper | 29 | Expired |
| US6340805B1 | Method of manufacturing a wire screen product | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6217711A | Method of treating condensates | Emerging Cross-Sectional Technologies | 9 | Expired |
| US6146604A | Method of removing nitrogen oxides from recovery boiler flue gases | Emerging Cross-Sectional Technologies | 9 | Expired |
| US6125688A | Method of determining pulp properties | Physics | 6 | Expired |
| US6235151A | Inhibiting scaling in alkaline waste liquor evaporators | Textiles; Paper | 5 | Expired |
| US6193406A | Method and apparatus for mixing pulp a suspension with a fluid medium with a freely rotatable mixing rotor | Performing Operations; Transporting | 4 | Expired |
| US6159338A | Supply of washing liquid in a fractionating multi-stage washer | Textiles; Paper | 4 | Expired |
| US6165316A | Method and plant for separating soap from black liquor using a pressure screen | Textiles; Paper | 3 | Expired |
| US6136145A | Method for treating pulp in an indirect heat exchanger in connection with bleaching | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US6354514B1 | Method and apparatus for treating material having poor thermal conductivity | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US6383342B1 | Cluster rule compliance with reduced steam consumption | Emerging Cross-Sectional Technologies | 2 | Expired |
| US7229527B2 | Method for the controlled thickening of low consistency fiber suspensions | Textiles; Paper | 2 | Expired |
| US6418637B1 | Method of sealing a rotary drum connection | Emerging Cross-Sectional Technologies | 1 | Expired |
| US6159564A | Core and a method of manufacturing such | Emerging Cross-Sectional Technologies | 1 | Expired |
| US6358363B1 | Method and apparatus for bleaching pulp using two fluidizing mixers | Textiles; Paper | 0 | Expired |
| US6375797B1 | Bleaching chemical pulp in a PkDQ-Po Sequence | Textiles; Paper | 0 | Expired |
| US6350348B1 | Batch cooking with black liquor pretreatment | Textiles; Paper | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.