Coated illuminating glassware and method of manufacture thereof

Claim 1

THE METHOD OF PRODUCING A LIGHT-DIFFUSING COATING ON THE INNER SURFACE OF A HOLLOW RADIATION-TRANSMITTING GLASS ARTICLE WHICH CO,PRISES FORMING A SLIGHTLY THIXOTROPIC AQUEOUS SUSPENSION OF SOLIDS CONSITING ESSENTIALLY OF FINELY DIVIDED AMORPHOUS SIO2 AND AT LEAST ONE ALKALINE EARTH METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF FORMATES,ACETATES, AND PROPIONATES AMOUNTING TO A TOTAL OF 0.005 TO 0.7 MOL ALKALINE EARTH METAL OXIDE PER MOL OF SIO2, THE SUSPENSION CONTAINING 0.85 TO 1.5 MOLS SIO2 PER LITER OF WATER AND SUFFICIENT AMMONIA DISSOLVED THEREIN TO HAVE A PH VALUE BETWEEN 7.3 AND 12 AND A VISCOSITY IMMDIATELY AFTER AGITATION OF 7.5 TO 12 CENTISOKES AT 25*C., FLUSHING THE INTERIOR OF THE ARTICLE WITH SAID SUSPENSION, ALLOWING EXCESS SUSPENSION TO DRAIN FROM THE ARTICLE AND RAPIDLY DRYING THE ADHERENT SUSPENSION AT A TEMPERATURE HIGH ENOUGH TO ELIMINATE VOLATILE CONSTITUENTS THEREOF BUT INSUFFICIENT TO SOFTEN THE GLASS.

Claim 2

THE METHOD OF PRODUCING A LIGHT-DIFFUSING COATING ON THE INNER SURFACE OF A HOLLOW RADIATION-TRANSMITTING GLASS ARTICLE WHICH CO,PRISES FORMING A SLIGHTLY THIXOTROPIC AQUEOUS SUSPENSION OF SOLIDS CONSITING ESSENTIALLY OF FINELY DIVIDED AMORPHOUS SIO2 AND AT LEAST ONE ALKALINE EARTH METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF FORMATES,ACETATES, AND PROPIONATES AMOUNTING TO A TOTAL OF 0.005 TO 0.7 MOL ALKALINE EARTH METAL OXIDE PER MOL OF SIO2, THE SUSPENSION CONTAINING 0.85 TO 1.5 MOLS SIO2 PER LITER OF WATER AND SUFFICIENT AMMONIA DISSOLVED THEREIN TO HAVE A PH VALUE BETWEEN 7.3 AND 12 AND A VISCOSITY IMMDIATELY AFTER AGITATION OF 7.5 TO 12 CENTISOKES AT 25*C., FLUSHING THE INTERIOR OF THE ARTICLE WITH SAID SUSPENSION, ALLOWING EXCESS SUSPENSION TO DRAIN FROM THE ARTICLE AND RAPIDLY DRYING THE ADHERENT SUSPENSION AT A TEMPERATURE HIGH ENOUGH TO ELIMINATE VOLATILE CONSTITUENTS THEREOF BUT INSUFFICIENT TO SOFTEN THE GLASS.