Methods for reducing corneal staining in contact lens wearers
CA 2587322 C · Owner: Neadle, Susan W. · Inventors: Jubin, Philippe F.; Jones, William F.; Hickson-Curran, Sheila B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides lenses in which peak pressure under the lens wearers eyelids is reduced. The invention provides lens design that reduce or eliminates mechanical chaffing of the cornea even in lenses made of high modulus material.
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 November 12, 2004 and granted January 14, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.