Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5427651 | Method for producing bleached sulfate pulp having a long fiber fraction and a short fiber fraction | — | 1995-06-27 |
| 5000823 | Method and apparatus for the processing of groundwood pulp to remove coarse particulate lignocellulosic material | — | 1991-03-19 |
| 4776926 | Process for producing high yield bleached cellulose pulp | — | 1988-10-11 |
| 4599138 | Process for pretreating particulate lignocellulosic material to remove heavy metals | — | 1986-07-08 |
| 4578147 | Process for manufacturing groundwood pulp while maintaining a high and uniform moisture content in the wood in the grinding zone | Gustaf E. Johnsson | 1986-03-25 |
| 4578148 | Process for manufacturing bright and strong bleached groundwood pulp of uniform quality | — | 1986-03-25 |
| 4562969 | Process for preparing groundwood pulp as short fiber and long fiber fractions | — | 1986-01-07 |
| 4537656 | Method for delignifying or bleaching cellulose pulp wherein chlorine is added to recycle liquor to regenerate chlorine dioxide | John R. Bergstrom | 1985-08-27 |
| 4444621 | Process and apparatus for the deresination and brightness improvement of cellulose pulp | — | 1984-04-24 |
| 4324612 | Process for the preparation of groundwood pulp | — | 1982-04-13 |
| 4294653 | Process for manufacturing chemimechanical cellulose pulp in a high yield within the range from 65 to 95% | Lars G. Rudstrom | 1981-10-13 |
| 4244778 | Process for the chemical refining of cellulose pulp | Claes G. S. Svensson | 1981-01-13 |
| 4207139 | Method for producing groundwood pulp | Pekka Haikkala | 1980-06-10 |
| 4207140 | Method of producing groundwood pulp | — | 1980-06-10 |