Patent · US Active

Process for manufacturing light absorbing polymer matrix

US11725136B2 · kind B2 · utility

0Cited by

4References

17Claims

0Family size

Assignee

Essilor International · FR

Inventors

John Biteau · Dallas, US
Ronald Berzon · Dallas, US
Pierre FROMENTIN · Bangkok, TH

Key dates

Filing date	Dec 19, 2018
Grant date	Aug 15, 2023
Priority date	—
Expiry date	Dec 19, 2038

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K2211/1018
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An ophthalmic lens comprising a transparent polymer matrix and core shell nanoparticles which are dispersed in the transparent polymer matrix, wherein the core of core shell nanoparticles results from polymerization of a composition comprising nanoparticle core precursors and at least one photochromic compound, and the shell of core shell nanoparticles comprises a mineral compound.

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