Patent · US Active

Water-soluble UV-absorbing compounds and uses thereof

US10472319B2 · kind B2 · utility

0Cited by

29References

14Claims

0Family size

Assignee

Novartis AG · CH

Inventors

Frank Chang · Cumming, US
Ryan DeSousa · Atlanta, US
Troy Vernon Holland · Suwanee, US
Walter R. Laredo · Fryeburg, US

Key dates

Filing date	May 2, 2019
Grant date	Nov 12, 2019
Priority date	—
Expiry date	May 2, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG02C7/108
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Described herein are dimethyl acetal-containing UV-absorbing compounds and their uses in preparing UV-absorbing polyvinyl alcohol prepolymers suitable for producing UV-absorbing contact lenses capable of blocking ultra-violet (“UV”) radiation and optionally (but preferably) violet radiation with wavelengths from 380 nm to 440 nm, thereby protecting eyes to some extent from damages caused by UV radiation and potentially from violet radiation. This invention also provides a UV-absorbing polyvinyl alcohol prepolymer.

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