Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4537656 | Method for delignifying or bleaching cellulose pulp wherein chlorine is added to recycle liquor to regenerate chlorine dioxide | Jonas A. I. Lindahl | 1985-08-27 |
| 4508593 | Process for recovery of sulfur dioxide liberated in the chemical pulping of lignocellulosic material | — | 1985-04-02 |
| 4348256 | Process for controlling the supply of delignifying and/or bleaching chemicals in the continuous delignification of lignocellulosic material | Sten L. Haggstrom | 1982-09-07 |
| 4192708 | Method for controlling the addition of active chemical for delignifying and/or bleaching cellulose pulp suspended in a liquor containing chemicals reactive with the delignifying and/or bleaching chemical | Bengt G. Hultman, Astrid T. P. Dalborg | 1980-03-11 |