Patent · US Active

Optical material with improved colour

US11480713B2 · kind B2 · utility

0Cited by

3References

18Claims

0Family size

Assignee

Essilor International · FR

Inventors

Tipparat LERTWATTANASERI · Bangkok, TH
Pierre FROMENTIN · Bangkok, TH

Key dates

Filing date	Mar 27, 2018
Grant date	Oct 25, 2022
Priority date	—
Expiry date	Aug 15, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG02C7/108
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Disclosed are polymerizable compositions for ophthalmic lenses. The compositions employ peroxide-based polymerization initiators with decreased capacity for dye degradation. The compositions enable the inclusion of color-balancing dyes, resulting in lenses with improved clarity and color balance.

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