Translating contact lens having a ramped ridge
CA 2491460 C · Owner: Lindacher, Joseph Michael · Inventors: Ye, Ming; Hall, Jordan William; Lindacher, Joseph Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a translating contact lens having a central axis, an anterior surface and an opposite posterior surface. The anterior surface includes an optical zone and a tamped ridge zone capable of controlling contact lens position on an eye in primary gaze and/or translating amount across the eye when the eye changes from gazing at an object at a distance to gazing at an object at an intermediate distance or at a nearby object. The tamped ridge zone is disposed below the optical zone and includes an upper edge, a lower tamped edge, a latitudinal ridge that extends outwardly from the anterior surface, and a ramp that extends downwardly from the lower tamped edge …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 23, 2003 and granted January 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 23, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.