Photochromic float glasses and methods of making the same
AssigneeGuardian Industries Corp.
InventorsKsenia A. Landa, Leonid M. Landa, Anthony V. Longobardo, Scott Thomsen
Life of this patent
Estimating the term…
Abstract
Photochromic float glass and methods of making the same are provided. In especially preferred forms, the present invention is embodied in float glass having a non-photochromic glass substrate layer and a photochromic layer fused onto the substrate layer. During production, layers of the photochromic and non-photochromic glass are brought into contact with under conditions which fuse the layers one to another.
Claims5
A method of making a photochromic glass comprising bringing a molten photochromatic glass layer formed of an iron and mixed silver halide-containing alkali alumino-borosilicate glass composition into contact with a molten non-photochromatic float glass layer at temperature and for a time sufficient to cause fusion to occur between said photochromatic glass layer and said non-photochromatic float glass layer at a surface boundary interface therebetween to thereby obtain a unitary glass structure exhibiting photochromic optical transmittance characteristics which reversibly vary in response to intensity of actinic radiation incident thereon.
Dependencies are inferred from the claim text.