Bi-focal corneal lens and method of making the same
CA 1265688 C · Owner: Laboratoires Super-Vision Inc. (Les) · Inventors: Beaulieu, Bernard; Rainville, Alain
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bi-focal corneal lens of uniform index of refraction, which is self-orienting, which is cut on a lathe with a lenticular attachment, so that the various curves can be cut in a minimum of passes. Mathematical equations are furnished to be fed to a comptuer which, calculates the parameters of the various curves in accordance with the data furnished by the optician so, as to provide a lens with a maximal optical zone and a minimal thickness.
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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
- Granted February 13, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 2007.
- 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.