Apparatus and method for performing presbyopia corrective surgery
CA 2353689 C · Owner: Bearer, George F. · Inventors: Ruiz, Luis Antonio; Bearer, George F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system, and process for correcting presbyopia with the system including a tissue removal system that preferably includes a laser system (200) with means (206) for forming a predetermined presbyopia correction contour corresponding to a predetermined ablation profile through controlled ablation on an exposed corneal stroma area of the eye, such that a central zone (A) of about 1 mm to 3 mm or more preferably 1.4 mm to 1.8 mm is left intact with a main maximum presbyopia ablation zone (B) bordering the untouched or hardly touched (e.g. a radius transition edge) central zone. The annular maximum ablation zone in the stroma is defined by a smoothly curving steep profile section which , …
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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 November 8, 1999 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 8, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 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
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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.