Method for producing silicone hydrogel contact lenses

US10843422B2 · kind B2 · utility

Assignee

• ALCON INC. · CH

Inventors

• Daqing Wu · Suwanee, US
• Steve Yun Zhang · Sugar Hill, US
• Xinming Qian · Johns Creek, US
• Zach Munoz · Smyrna, US
• Frank Chang · Cumming, US
• Wei Liang · Johns Creek, US
• Ying Zheng · Suwanee, US
• Richard Charles Breitkopf · Dunwoody, US
• Matthew D. Nelson · Salt Lake City, US
• Augustine Twum Kumi · Grayson, US

Key dates

• Filing date: Jun 6, 2018
• Grant date: Nov 24, 2020
• Expiry date: Dec 29, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L83/04
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The present invention generally relates to a method for producing inherently wettable silicone hydrogel contact lenses with a robusteness of lens shape and having relatively high oxygen permeability, relatively high equilibrium water content and relatively low elastic modulus.