Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12059087 | Flexible element for forming a piece of disposable cutlery | — | 2024-08-13 |
| 5456799 | Method for controlling activation of lignocellulosic material in the presence of a nitrate containing liquid | — | 1995-10-10 |
| 4897156 | Process for activating cellulose pulp with NO and/or NO.sub.2 and oxygen in the presence of nitric acid and then delignifying bleaching the activated cellulose pulp | — | 1990-01-30 |
| 4853082 | Process for the activation and delignification of cellulose pulp | — | 1989-08-01 |
| 4762591 | Apparatus for reacting lignocellulosic material with a gas phase comprising a nitrogen oxide and oxygen under controlled gas pressure | — | 1988-08-09 |
| 4750973 | Process for reducing carbohydrate losses in the sulfate pulping of wood by pretreating the wood with oxygen and nitrogen oxides | Erik Olof Sture Hagglund | 1988-06-14 |
| 4725335 | Process for producing nitrogen oxides from aqueous waste cellulose pulp liquor containing nitrogen compounds | — | 1988-02-16 |
| 4602982 | Process for delignifying bleaching lignin-containing cellulose pulp by activating the pulp with NO.sub.2 and O.sub.2 gas in the presence of water, sodium nitrate and nitric acid | — | 1986-07-29 |
| 4561936 | Process for the conversion of lignocellulosic material to cellulose pulp by alkaline preoxidation followed by alkaline oxygen-free digestion both in the presence of a redox additive | — | 1985-12-31 |
| 4445969 | Process for the delignifying bleaching of cellulose pulp by activating the pulp with NO.sub.2 and oxygen | — | 1984-05-01 |
| 4439271 | Process for the oxygen bleaching of cellulose pulp | — | 1984-03-27 |
| 4406735 | Process for alkaline oxygen gas bleaching of cellulose pulp | — | 1983-09-27 |
| 4372811 | Alkaline oxygen delignification and bleaching of cellulose pulp in the presence of aromatic diamines | Kjell Abrahamsson | 1983-02-08 |