Invention Grant
- Patent Title: Silicone hydrogel lenses with water-rich surfaces
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Application No.: US16925060Application Date: 2020-07-09
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Publication No.: US11364695B2Publication Date: 2022-06-21
- Inventor: Yongxing Qiu , John Dallas Pruitt , Sibichen J. Thekveli , Robert Carey Tucker , Jared Nelson
- Applicant: Alcon Inc.
- Applicant Address: CH Fribourg
- Assignee: Alcon Inc.
- Current Assignee: Alcon Inc.
- Current Assignee Address: CH Fribourg
- Agent Jian Zhou
- Main IPC: B29D11/00
- IPC: B29D11/00 ; G02C7/04 ; G02B1/04 ; G02B1/10 ; G02B1/18 ; C08J7/04 ; C08L83/04 ; C08G77/388 ; C08J5/00 ; C09D5/16 ; C09D133/02 ; C09D133/14 ; C09D133/26 ; C09D171/02 ; C09D177/06

Abstract:
The invention is related to a hydrated silicone hydrogel contact lens having a layered structural configuration: a lower water content silicone hydrogel core (or bulk material) completely covered with a layer of a higher water content hydrogel totally or substantially free of silicone. A hydrated silicone hydrogel contact lens of the invention possesses high oxygen permeability for maintaining the corneal health and a soft, water-rich, lubricious surface for wearing comfort.
Public/Granted literature
- US20200339836A1 SILICONE HYDROGEL LENSES WITH WATER-RICH SURFACES Public/Granted day:2020-10-29
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