Patent · US Active

Cast-molding process for producing contact lenses

US10906258B2 · kind B2 · utility

4Cited by

95References

7Claims

0Family size

Assignee

ALCON INC. · CH

Inventors

Troy Vernon Holland · Suwanee, US
Frank Chang · Cumming, US
Ryan DeSousa · Atlanta, US

Key dates

Filing date	Aug 28, 2018
Grant date	Feb 2, 2021
Priority date	—
Expiry date	Nov 6, 2038

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29K2105/24
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Described herein is a cast-molding process for producing contact lenses in a relatively short curing time. The short curing time has been achieved by adding a chain transfer agent into a lens-forming composition.

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