Description
Class C03C : CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
Subclass 3/083: Glass compositions (glass batch compositions C03C 6/00) containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound