Silicone hydrogel contact lenses

US10968319B2 · kind B2 · utility

Assignee

• ALCON INC. · CH

Inventors

• Steve Yun Zhang · Sugar Hill, US
• Maria F. Gubitosi Raspino · Lilburn, US
• Richard Charles Breitkopf · Dunwoody, US
• Daqing Wu · Suwanee, US
• Junhao Ge · Johns Creek, US
• Augustine Twum Kumi · Grayson, US
• Zach Munoz · Smyrna, US
• Weihong Lang · Suwanee, US

Key dates

• Filing date: Feb 21, 2019
• Grant date: Apr 6, 2021
• Expiry date: Apr 19, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2210/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The present invention generally relates to silicone hydrogel contact lenses each inherently having, on lens surfaces, a relatively-high concentration of primary amino groups and to a method for producing the same. The invention is also related to silicone hydrogel contact lens precursors each inherently having, on lens surfaces, a relatively-high concentration of N-Boc-protected primary amino groups which can be easily and conveniently deprotected during lens extraction and/or hydration steps.