Multi-step laser correction of ophthalmic refractive errors
CA 2388014 C · Owner: Technolas Gmbh Ophthalmologische Systeme · Inventors: Hohla, Kristian; Youssefi, Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A technique of refractive eye correction employs multiple steps to correct refractive errors in the eye. In the first step gross decentrations of the , refractive error are corrected allowing the subsequent steps to be relatively symmetric in their treatment profile. Then the eye's refractive error is , again measured and a subsequent treatment is applied for the remaining error. The overall treatment is thus completed in two or more steps.
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 October 20, 2000 and granted April 16, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 20, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 2022.
- 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.