Ppg Industries, Inc.

Peter P Harmon

Charles B Greenberg

William R Siskos

Thomas Patrick Kerr

Karl H Bloss

James L Oravitz, Jr

Shaow B Lin

Paul E Shaffer

A vacuum insulating unit has a pair of glass sheets spaced from one another by a plurality of plastic supports. The supports have one end secured to one of the sheets and a low friction material on the other end. A flexible metal edge retainer is secured to sheets to provide a sealed compartment between the sheets. Air in the compartment is removed to put the compartment under negative pressure. A getter is provided in the compartment to adsorb any gas therein during sealing or using the unit. One of the sheets may have an environmental coating. Methods are disclosed for fabricating the unit and the supports.

Vacuum insulating unit

An organotin coating composition comprising bis-tributyltin oxide is disclosed, along with a chemical vapor deposition method for pyrolyzing it to form a tin oxide film on the surface of a substrate.

Vapor deposition of bis-tributyltin oxide

Novel copper-silver metallic films are prepared on transparent articles by chemical replacement of silver for copper according to the method of the present invention. A transparent article is coated with a metallic copper film by a conventional method of deposition. The copper coated article is then contacted by a solution comprising a silver salt, ammonia and a complexing agent which promotes replacement but which does not accelerate the oxidation of residual metallic copper in the film. Replacement of copper by silver occurs with the film retaining its reflective metallic character.

Thin films containing metallic copper and silver by replacement without

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North Huntington, PA, United States of America

Peter P Harmon