Ppg Industries, Inc.

William E Wagner

Harry S Koontz

Vern A Henery

James F Wilson

James A Davis

Glen E Freeman

Harold E Donley, Deceased

John J Everhart

A moisture sensor to sense rain on a windshield. The sensor members on the outboard surface of the windshield are uncoated and directly exposed to any moisture accumulation on the sensor. Leads connect the sensor to an electrical signal generator and receiver and are insulated from each other to prevent direct electrical interconnection therebetween and subsequent shorting of the sensor circuitry. When moisture is on the sensor, the nature of a monitorable electrical signal passing through the sensor changes and is detected. In response to the altered signal, the windshield wipers are actuated.

Windshield moisture sensor

A method and apparatus are disclosed for producing a film on a substrate surface from a cloud of dust-sized particles of a coating reactant.

Deposition of coatings from fine powder reactants

A method for making dialkyltin difluorides by reacting the corresponding dialkyltin diacetate with hydrogen fluoride is disclosed.

Method for making dibutyltin difluoride

Electroconductive tin oxide coatings are deposited by an airless method of spraying a liquid composition of a thermally decomposable tin compound onto a hot glass surface in order to prevent overspray of the liquid coating composition onto the opposite glass surface.

Airless spray method for depositing electroconductive tin oxide coatings

A method is disclosed for pyrolytically forming electroconductive tin oxide films having higher resistivity for a given thickness than tin oxide films formed by known methods by adding to the film forming solution an organic compound which retards the rate of film formation reducing the particle size of the tin oxide film thus increasing the resistivity of the film. Small quantities of an organic compound such as cresol or benzyl alcohol added to the film-forming solution may increase the resistivity by a factor of five for a typical film thickness.

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Verona, PA, United States of America

William E Wagner