Methods for designing multifocal ophthalmic lenses
CA 2772025 C · Owner: Johnson & Johnson Vision Care, Inc. · Inventors: Skinner, Michael; Jubin, Philippe F.; Poling, Timothy R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides multifocal ophthalmic lenses useful for correcting presbyopia. The lenses of the invention exhibit a better distribution of the distance and near vision powers within the multifocal zone and thus, improved visual acuity and wearer satisfaction.
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 July 29, 2002 and granted September 24, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 29, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 29, 2024.
- 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.