Ophthalmic devices derived from grafted polymeric networks and processes for their preparation and use
US-2024018294-A1 · Jan 18, 2024 · US
Silicone hydrogel lenses with water-rich surfaces
US8939577B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8939577-B2 |
| Application number | US-201313900136-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 22, 2013 |
| Priority date | Jul 30, 2010 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
Official abstract text for this publication.
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.
First claim
Opening claim text (preview).
What is claimed is: 1. A silicone hydrogel contact lens having a layered structural configuration and a water content gradient from inside to outside of the silicone hydrogel contact lens, comprising: a silicone hydrogel core (or bulk material) completely covered with an outer (surface) hydrogel layer having a thickness of at least about 0.1 μm as measured with atomic force microscopy across a cross section from the posterior surface to the anterior surface of the silicone hydroge…
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Classifications
Physics · mapped topic
- B29D11/00067Primary
Operations & Transport · mapped topic
- G02C7/049Primary
Physics · mapped topic
Physics · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8939577B2 cover?
- 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 …
- Who is the assignee on this patent?
- Novartis Ag
- What technology area does this patent fall under?
- Primary CPC classification B29D11/00067. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).