Deformable intraocular corrective lens
CA 2284963 C · Owner: Callahan, Wayne B. · Inventors: Callahan, Wayne B.; Callahan, Jeffrey S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A deformable, artificial intraocular corrective lens for implantation into the human eye to correct normal vision problems. The lens may be positioned posteriorly from the iris resting against the anterior surface of the posterior capsule's natural lens. Alternatively the lens may be positioned in the anterior chamber of the eye. The implanted lens works in conjunction with the cornea and natural lens to provide proper vision as a substitute for regular contact lens spectacles, and radial keratotomy. The lens may be designed from a rigid or semi-rigid material. Due to the thinness of the structure the lens may be rolled and inserted into the eye minimizing both the length cf the corneal …
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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 October 4, 1999 and granted December 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 4, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 4, 2021.
- 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.