Method for obtaining a coating of a preferred composition on a surface of a glass substrate

Claim 1

A method for obtaining a preferred multi-component metallic oxide coating on a surface of a glass substrate by pyrolytic coating techniques in which a heat decomposable, non-homogeneous, dry powder mixture of organic based metallic salts are sprayed against said surface of said glass substrate while said surface is a temperature of at a range from 700° F. to 1200° F., which method comprises the steps of: selecting a preferred composition for a multi-component metallic oxide coating for said surface of said glass substrate; forming a plurality of testing samples of said non-homogeneous, dry powder mixture, each sample having a different composition of said multi-component organic based metallic salts; spraying under identical condition individual test specimens of glass substrates with individual test samples of said dry powder mixture, thereby to form a plurality of coated test specimens, each coated test specimen having a different composition of a metallic oxide coating thereon; analyzing each of said coated test specimens to determine the chemical composition of said coating thereon; determining which coated test specimen has a coating thereon of said preferred composition; and spraying commercial quantities of glass under the same spraying conditions used to spray said test specimens, said commercial spraying being carried out with the dry powder mixture having the composition which produced said preferred composition on said coated test specimen.

Claim 2

A method for obtaining a preferred multi-component metallic oxide coating on a surface of a glass substrate by pyrolytic coating techniques in which a heat decomposable, non-homogeneous, dry powder mixture of organic based metallic salts are sprayed against said surface of said glass substrate while said surface is a temperature of at a range from 700° F. to 1200° F., which method comprises the steps of: selecting a preferred composition for a multi-component metallic oxide coating for said surface of said glass substrate; forming a plurality of testing samples of said non-homogeneous, dry powder mixture, each sample having a different composition of said multi-component organic based metallic salts; spraying under identical condition individual test specimens of glass substrates with individual test samples of said dry powder mixture, thereby to form a plurality of coated test specimens, each coated test specimen having a different composition of a metallic oxide coating thereon; analyzing each of said coated test specimens to determine the chemical composition of said coating thereon; determining which coated test specimen has a coating thereon of said preferred composition; and spraying commercial quantities of glass under the same spraying conditions used to spray said test specimens, said commercial spraying being carried out with the dry powder mixture having the composition which produced said preferred composition on said coated test specimen.

Claim 3

A method for obtaining a preferred multi-component metallic oxide coating on a surface of a glass substrate by pyrolytic coating techniques in which a heat decomposable, non-homogeneous, dry powder mixture of organic based metallic salts are sprayed against said surface of said glass substrate while said surface is at a temperature in the range from 700° F. to 1200° F., which method comprises the steps of: selecting a preferred composition for a multi-component metallic oxide coating for said surface of said glass substrate; forming a non-homogeneous, dry powder mixture of said multi-component organic based metallic salts; spraying under varying conditions individual test specimens of glass substrates with said test sample of said dry powder mixture thereby to form a plurality of coated test specimens, each coated test specimen having a different composition of a metallic oxide coating thereon; analyzing each of said coated test specimens to determine the chemical composition of said coating thereon; determining which coated test specimen has a coating thereon of said preferred composition; and spraying commercial quantities of said glass under the same spraying conditions used to spray said test specimen which had said coating thereon of said preferred composition, said spraying operation being carried out with the dry powdered mixture used for spraying the test specimens.

Claim 4

A method for obtaining a preferred multi-component metallic oxide coating on a surface of a glass substrate by pyrolytic coating techniques in which a heat decomposable, non-homogeneous, dry powder mixture of organic based metallic salts are sprayed against said surface of said glass substrate while said surface is at a temperature in the range from 700° F. to 1200° F., which method comprises the steps of: selecting a preferred composition for a multi-component metallic oxide coating for said surface of said glass substrate; forming a non-homogeneous, dry powder mixture of said multi-component organic based metallic salts; spraying under varying conditions individual test specimens of glass substrates with said test sample of said dry powder mixture thereby to form a plurality of coated test specimens, each coated test specimen having a different composition of a metallic oxide coating thereon; analyzing each of said coated test specimens to determine the chemical composition of said coating thereon; determining which coated test specimen has a coating thereon of said preferred composition; and spraying commercial quantities of said glass under the same spraying conditions used to spray said test specimen which had said coating thereon of said preferred composition, said spraying operation being carried out with the dry powdered mixture used for spraying the test specimens.