72180116
Oct 30, 1963
Oct 27, 1964
FOAMING AGENT USED AS AN INGREDIENT IN PREPARING FORMULAS OF GYPSUM SLURRY USED IN THE MANUFACTURE OF GYPSUM WALLBOARD FOR THE PURPOSE OF REDUCING DENSITY, IMPROVING WORKABILITY AND SCORING, DISPERSING WATER UNIFORMLY THROUGHOUT THE SAME AND TO INCREASE THE BOND STRENGTH OF THE PAPER TO THE GYPSUM CORE
Metal Goods