Methods for rotationally stabilizing contact lenses
CA 2859821 C · Owner: Johnson & Johnson Vision Care, Inc. · Inventors: Neadle, Susan-Wendy; Hickson-Curran, Sheila B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides contact lenses which have improved dynamic stabilization and that utilize one or more thin zones in the lens' periphery. Each zone 21 has a convex edge 22 that is the outermost boundary of the thin zones in relation to the optic zone of the lens. The innermost boundary of the thin zone is formed by shoulders 23 inwardly tapering edges 24 and edge 25. Each shoulder 23 is integral with and extends inwardly from each end of convex edge 22. Each of the inwardly tapering edges 24 is continuous with a shoulder 23 and edge 25 extending therebetween.
Read the whole patent
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 May 13, 2005 and granted October 20, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 13, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.