| Patents for D21J 1 - Fibreboard (1,125) |
|---|
| 11/21/1978 | US4126512 Perlitic insulating board |
| 10/03/1978 | US4118273 Incorporation of fine perlite particles in slurry |
| 09/19/1978 | USRE29770 Manufacture of fiberboard according to the wet method with closed backwater system |
| 09/12/1978 | US4113556 Paper machine with twin-wire former |
| 09/12/1978 | US4113555 Hard board or medium density board, process for production thereof and means for practicizing the process |
| 09/12/1978 | US4113554 Drying wet fibers, hot pressing |
| 08/15/1978 | CA1036468A1 Press |
| 05/16/1978 | US4089740 Apparatus for applying secondary layer on board surface |
| 04/11/1978 | US4083744 Method of preparing composition board with improved polymeric skin |
| 02/28/1978 | US4076580 Flame retardant cellulosic boards |
| 02/07/1978 | US4072558 Non-combustible hardboard sheet |
| 11/01/1977 | US4056656 Flame-resistant laminates |
| 10/11/1977 | US4053339 Method of making composite paper hardboard panel |
| 09/27/1977 | US4050863 Apparatus for the hot-pressing of composite boards made from lignocellulosic material |
| 07/26/1977 | US4038131 Short cycle pressed fiberboard manufacturing process |
| 07/12/1977 | US4035544 Asphalt roofing and method of making same |
| 06/28/1977 | US4032394 Method of making wet-pressed fiberboard of high resistance to bending |
| 06/28/1977 | US4032393 Cellulosic construction boards |
| 05/17/1977 | US4024014 Non-combustible hardboard sheet |
| 03/15/1977 | US4012279 Process of producing pulp, for manufacture of fiberboard, in a closed backwater system |
| 02/22/1977 | US4009073 Production of hardboard in a closed water system |
| 10/26/1976 | US3988199 Perlite insulation board and method of making the same |
| 06/29/1976 | US3966540 Manufacture of fiberboard according to the wet method with closed backwater system |
| 04/20/1976 | US3951735 Process for preparing gypsum board |
| 01/27/1976 | US3935336 Process for making carrier sheets impregnated with aminoplast condensation resins |