Back to results
US 4,786,563 AGranted
Protective coating for low emissivity coated articles
AssigneePPG Industries, Inc.
InventorsF. Howard Gillery, Russell C. Criss, James J. Finley
Life of this patent
Estimating the term…
Abstract
A multiple layer high transmittance, low emissivity coated article is disclosed with improved chemical resistance as a result of a protective overcoat of titanium oxide.
Claims8
A high transmittance, low emissivity article comprising:
- a. a transparent nonmetallic substrate;
- b. a first transparent anti-reflective film comprising a metal oxide deposited on a surface of said substrate;
- c. a transparent infrared reflective metallic film deposited after said first anti-reflective metal oxide film;
- d. a second transparent anti-reflective film comprising a metal oxide deposited after said infrared reflective metallic film;
- and
- e. a protective metal oxide overcoat deposited after said second anti-reflective metal oxide film comprising a metal oxide having a greater durability than said anti-reflective metal oxide at a thickness which does not significantly affect the reflectance and transmittance of the coated article.
3 more elements
Dependencies are inferred from the claim text.