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Mejoras en la fabricación de sulfato básico de plomo y cloruro básico de plomo y formas básicas de otras sales de plomo insolubles o ligeramente solubles que las haga aptas para emplearse con colores blancos.
Mejoras en los medios y aparatos empleados en la fabricación de sulfatos, de cuyas mejoras algunas partes son aplicables a la fabricación del ácido sulfúrico.