Laser reprofiling system employing a light restricting mask
CA 2021696 A1 · Owner: Muller, David F. · Inventors: Klopotek, Peter J.; Muller, David F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a masking apparatus for use in laser reprofiling of corneal tissue. The masking apparatus comprises a support structure which can be, affixed upon a cornea, and a mask connected to the support structure and disposed above the cornea. The mask includes a light restriction element which may, be an iris or a series of apertures in a rotatable plate, and a control element for regulating laser impingement on the corneal tissue. In operation the, light restriction element is adjusted to regulate the radiant energy incident upon the cornea. The apparatus accordingly provides a method for the selective photoablation of the cornea.
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 20, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 2012.
- 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.