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| Number | Title | Issue Date |
| 4859650 | Pressure-sensitive recording material A pressure-sensitive recording material is disclosed, having microcapsules containing a triphenylmethane leuco-dye dissolved in a solvent composed at least 80% of plant, animal or paraffin oils, the microcapsule walls being formed of a wall material which... | 08/22/1989 |
| 4347128 | Flotation apparatus for de-inking pulp suspensions Flotation apparatus for de-inking of pulp suspension in a flotation cell with injectors for feeding the pulp suspension into the cell and for aerating the pulp suspension. The injectors are equipped with wide slot nozzles through which the suspension flow... | 08/31/1982 |
| 4331048 | Cutting tip for metal-removing processing A sintered cutting tip composed of 70-90 weight percent of aluminum oxide; 10-30 weight percent of zirconium oxide; 0.1-0.5 weight percent of magnesium oxide, and less than 0.6 weight percent of impurities, having a porosity of less than 2%, an average particle siz... | 05/25/1982 |
