Rca Inc.

Thomson Licensing

Thomson Consumer Electronics Inc.

Barry Michael Cushman

Samuel B Deal

John J Moscony

James Francis Edwards

David Paul Ciampa

John N Bleacher

A display screen of a color display is disclosed (see FIG.). The display screen includes a glass plate having an array of three different color-emitting phosphors thereon. A graphite-based matrix is placed in the interstitial regions between each of the three different color-emitting phosphors. The graphite-based matrix is formed from an aqueous composition including graphite, potassium silicate and sodium silicate.

Bi-silicate matrix coating for a display

Ferric chloride is separated from nickel chloride in a spent etchant solution 10 using a solvent extractant system 12. An extractant solution 14 is mixed with an HCl solution 16 to form an aqueous layer 18 and an organic extractant 20. The organic extractant 20 is introduced into an extraction section 22 of the system 12 and mixed with a recycled, stripped organic solvent 32 and a first raffinate 34 to form a first mixture 36 which is separated into a first organic layer 38 and a Ni-containing aqueous layer 40. A feed solution 44 consisting of the spent etchant solution 10 and concentrated HCl is combined with the first organic layer 38 to form a second mixture 46 which is separated into the first raffinate 34 and an organic solution 47 having a high concentration of iron. The solution 47 is introduced into a stripping section 48 of the system 12 and mixed with a raffinate 58 to form a third mixture 60 which is separated into a partially stripped organic layer 62 and an aqueous ferric chloride solution 64. A second HCl solution 66 is combined with the organic layer 62 to form a fourth mixture 68 which is separated into the organic solvent 32 and the raffinate 58. The aqueous ferric chloride solution 64 is processed 70 to provide either a concentrated ferric chloride etchant solution 72 in a continuous system 13, or a dried ferric chloride salt 74, in a non-continuous system.

Solvent extraction method of separating ferric chloride from nickel

A dark-colored undercoating is deposited on a desired surface area of a glass workpiece, and a light-colored overcoating is applied upon the undercoating, each coating being dried in less than about 60 seconds. Then a plurality of related marks is recessed through the overcoating by ablation, as with a laser beam. Each of the undercoating and the overcoating is comprised of pigment particles and an alkali silicate binder. Unlike the prior practice, the undercoating contains an operative proportion of mica particles, and the overcoating is essentially free from mica.

Method for ablating a coded marking into a glass workpiece and product

An undercoating is deposited on a glass workpiece and an overcoating is applied upon the undercoating. Then a plurality of related marks is recessed through the overcoating, thereby producing the novel workpiece. Each of the undercoating and overcoating is comprised of pigment particles and an alkali silicate binder. The alkali silicate binder of at least one coating, and preferably both the undercoating and the overcoating, consists essentially of a mixture of sodium silicate, potassium silicate and lithium silicate. The coatings are made from aqueous suspensions of pigment particles, dissolved sodium silicate, dissolved potassium silicate and lithium-stabilized silica sol.

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Lancaster, PA, United States of America

Barry Michael Cushman