Issued Patents All Time
Showing 1–25 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11312101 | Composite material and method for production of the same | — | 2022-04-26 |
| 8443764 | Arrangement for the adjustment of equipment for a boiler | Ola Herstad, Robert Tillander, Henrick Lindell, Timo Vulli | 2013-05-21 |
| 7217302 | Process for cooling solid and gaseous material during gasification of spent liquor | — | 2007-05-15 |
| 6790246 | Apparatus for gasification of spent liquor | — | 2004-09-14 |
| 6780211 | Device for gasification of spent liquor | Per Alström | 2004-08-24 |
| 6500301 | Apparatus for gasification of spent liquor | — | 2002-12-31 |
| 6336994 | Totally chlorine free bleaching process using recovered filtrate | Ake Backlund, Lars Stigsson | 2002-01-08 |
| 6238468 | Quench vessel | — | 2001-05-29 |
| 6163981 | Method and apparatus for drying wood particles | — | 2000-12-26 |
| 6113739 | Process for washing gas formed by gasifying black liquor | — | 2000-09-05 |
| 6062547 | Quench vessel for recovering chemicals and energy from spent liquors | — | 2000-05-16 |
| 6030493 | Process for recovering chemicals and energy from cellulose spent liquor using multiple gasifiers | — | 2000-02-29 |
| 6027609 | Pulp-mill recovery installation for recovering chemicals and energy from cellulose spent liquor using multiple gasifiers | — | 2000-02-22 |
| 5976321 | Process for making sulfur enhanced undigested cellulosic fiber material and pulp | — | 1999-11-02 |
| 5868805 | Process for integrated evaporation and gasification of spent liquor from cellulose cooking | — | 1999-02-09 |
| 5660685 | Gasifying black liquor with recycling of generated hydrogen sulphide gas to the gasifier | — | 1997-08-26 |
| 5556602 | Device in a reactor for gasifying spent liquor | — | 1996-09-17 |
| 5486269 | Gasification of carbonaceous material in a reactor having a gasification zone and a combustion zone | — | 1996-01-23 |
| 5439557 | Method of recovering energy and chemicals from a spent liquor using low frequency sound in a recovery boiler | — | 1995-08-08 |
| 5407455 | Reactor for gasification of cellulose-waste liquors especially black liquor | — | 1995-04-18 |
| 5370771 | Process for recovering energy and chemicals from spent liquor using low frequency sound | — | 1994-12-06 |
| 5085735 | Method of refining cellulosic fibrous material with successive expansions before impacts, and expansions, to achieve increased fiber flexibility | — | 1992-02-04 |
| 5039022 | Refiner element pattern achieving successive compression before impact | — | 1991-08-13 |
| 4986480 | Method and apparatus for feeding a conical refiner | Johan Gullichsen, Ronny Hoglund | 1991-01-22 |
| 4710268 | Method for regulating the pressure of blow-through discharge steam from a reboiler of process steam produced during production of mechanical pulp | — | 1987-12-01 |