Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8066846 | Composition and process for the treatment of fibre material | Aarto Paren, Jukka Rautiainen, Reijo Aksela, Ilkka Renvall, Anna Ilomäki +4 more | 2011-11-29 |
| 8048264 | Composition and process for the treatment of fibre material | Aarto Paren, Jonni Ahlgren, Ilkka Renvall, Jukka Rautiainen | 2011-11-01 |
| 7988821 | Process for the treatment of fibre material and new composition | Seung-Hoon Lee, Jonni Ahlgren, Aarto Paren, Jukka Rautiainen, Ilkka Renvall | 2011-08-02 |
| 7867357 | Polymer composition for peroxide bleaching of cellulosic fibre material and processes for peroxide bleaching | Jonni Ahlgren, Aarto Paren, Timo Härmä, Ilkka Renvall | 2011-01-11 |
| 7754048 | Bleaching of cellulosic fibre material with peroxide using polymers as a stabiliser | Aarto Paren, Ilkka Renvall, Jonni Ahlgren, Riitta Laitinen, Jussi Nikkarinen +1 more | 2010-07-13 |
| 7731818 | Process for deinking waste paper | Bob Horacek, Mikael Svedman | 2010-06-08 |
| 7674851 | Polymer composition for peroxide bleaching of cellulosic fibre material and processes for peroxide bleaching | Jonni Ahlgren, Aarto Paren, Timo Härmä, Ilkka Renvall | 2010-03-09 |
| 7481905 | Process for manufacturing board | Aarto Paren, Ari Juppo, Reetta Strengell | 2009-01-27 |
| 6331192 | Bleaching of chemical pulp and treatment with a chelating agent | Reijo Aksela, Aarto Paren, Ilkka Renvall | 2001-12-18 |
| 6264790 | Process for the peracid bleaching of chelated chemical pulp | Aarto Paren, Reijo Aksela, Ilkka Renvall | 2001-07-24 |
| 6165318 | Delignification of chemical pulp with peroxide in the presence of a silicomolybdenic acid compound | Aarto Paren, Juha Patola | 2000-12-26 |