MUMBAI, India, June 26 -- Intellectual Property India has published a patent application (202441099808 A) filed by Saint-Gobain Glass France on December 13, 2024, for A Neutral-Grey External Reflection Solar Control Glass Article.
Inventors include Divya Janani P; Nidhi Sharma; and Sreeja S.
The application for the patent was published on June 19, 2026, under issue no. 25/2026.
Abstract: A neutral-grey external reflection solar glass article comprising a transparent substrate having a first surface provided with a thin multilayer coating comprising a first functional layer based on titanium nitride and a second functional layer based on niobium nitride, each functional layers sandwiched between two dielectric coatings. The thin multilayer coating is characterized in that a ratio of thickness of the second functional layer to the first functional layer is less than 2 in combination with a ratio of the sum of the thicknesses of the dielectric coatings sandwiching each of the first and second functional layers to the thickness of the first dielectric coating is less than 6 provides for achieving the neutral-grey external reflection color desired by the present invention. Fig. 1
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