Patent · US Active

Item having improved thermomechanical properties, comprising an organic-inorganic layer

US11707921B2 · kind B2 · utility

0Cited by

2References

19Claims

0Family size

Assignee

Essilor International · FR

Inventors

Sébastien Chiarotto · Charenton-le-Pont, FR
Karin Scherer · Charenton-le-Pont, FR

Key dates

Filing date	Jul 8, 2020
Grant date	Jul 25, 2023
Priority date	—
Expiry date	Oct 18, 2040

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31663
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The invention relates to an item comprising a substrate having at least one main surface coated with a multilayer interferential coating comprising at least one layer with a refractive index higher than 1.65 and at least one layer with a refractive index lower than, or equal to, 1.65, at least one of the layers of the interferential coating being an organic-inorganic layer that has been deposited in a vacuum environment and has a thickness of at least 30 nm, said interferential coating having a thickness of at least 450 nm and/or at least 8 layers.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.