Corneal heat and stretch method and apparatus
CA 2325546 A1 · Owner: Stanley, H. Mark Iii · Inventors: Stanley, H. Mark Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus to alter the shape of the cornea of an eye provide for heating (44) a portion of the cornea to a temperature not exceeding the collagen shrinkage temperature, applying a pressure differential (40) to a portion of the cornea. The combined effect of elevated temperature and , stretching forces leads to permanent residual strains in preferred directions thus to a permanent new shape of the cornea. The method is applicable to the correction or reduction of myopia, hyperopia and astigmatism.
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 March 12, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 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.