ANDRITZ INC.
313Patents
224Active
313Granted
55Portfolio score
Filing activity: Jun 5, 1996 → Apr 16, 2024 · 69 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8057639B2 | System and method for preextraction of hemicellulose through using a continuous prehydrolysis and steam explosion pretreatment process | Chemistry; Metallurgy | 51 | Active |
| USD916890S1 | Display panel portion with a computer icon | General | 35 | Active |
| US7293659B2 | Drum structure for rotary drum filtering apparatus and methods of using same | Performing Operations; Transporting | 26 | Active |
| US7314556B2 | Filter disc with panel sectors | Performing Operations; Transporting | 26 | Expired |
| US7300541B2 | High defiberization chip pretreatment | Textiles; Paper | 20 | Expired |
| US8157195B2 | Mechanical pulping refiner plate having curved refining bars with jagged leading sidewalls and method for designing plates | Textiles; Paper | 17 | Active |
| US7758720B2 | High defiberization pretreatment process for mechanical refining | Textiles; Paper | 16 | Active |
| US6899791B2 | Method of pretreating lignocellulose fiber-containing material in a pulp refining process | Textiles; Paper | 16 | Expired |
| US7022061B2 | Centrifuge discharge port with power recovery | Performing Operations; Transporting | 15 | Expired |
| US7300540B2 | Energy efficient TMP refining of destructured chips | Textiles; Paper | 15 | Expired |
| US7758721B2 | Pulping process with high defiberization chip pretreatment | Textiles; Paper | 15 | Active |
| US6808634B1 | Method and device for cross-flow filtration | Performing Operations; Transporting | 14 | Expired |
| US6841042B2 | Feeding comminuted fibrous material using high pressure screw and centrifugal pumps | Textiles; Paper | 12 | Expired |
| US7357074B2 | Compression screw with combination single and double flights | Performing Operations; Transporting | 12 | Expired |
| US8028945B2 | Refiner plates having steam channels and method for extracting backflow steam from a disk refiner | Textiles; Paper | 12 | Active |
| US7713381B2 | TMP refining of destructured chips | Textiles; Paper | 11 | Active |
| US6379504B1 | Apparatus for pulping sawdust | Textiles; Paper | 11 | Expired |
| US7758726B2 | Disc refiner with increased gap between fiberizing and fibrillating bands | Textiles; Paper | 10 | Active |
| US8216423B2 | Multi-stage AP mechanical pulping with refiner blow line treatment | Textiles; Paper | 10 | Active |
| US6447645B1 | Feeding cellulose material to a treatment vessel | Textiles; Paper | 10 | Expired |
| US8048263B2 | Four stage alkaline peroxide mechanical pulpings | Textiles; Paper | 10 | Active |
| US7478773B2 | Tooth refiner plates having V-shaped teeth and refining method | Textiles; Paper | 10 | Expired |
| US7690131B2 | Device for continuous drying of a pulp web | Textiles; Paper | 9 | Expired |
| US7900862B2 | Mechanical pulping refiner plate having curved refining bars with jagged leading sidewalls and method for designing plates | Textiles; Paper | 9 | Active |
| US8906198B2 | Method for production of micro fibrillated cellulose | Textiles; Paper | 9 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.