Method for identifying characteristics of contact lenses
CA 2284818 C · Owner: Bausch & Lomb Incorporated · Inventors: Appleton, William J.; Cronk, William B.; Gabriel, Emily Abrams
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Contact lenses include a posterior surface including a first identifiable marking, and an interior surface includes a second identifiable marking different from the first marking, the first and second markings in combination designating the optical correction of the lenses. The lenses are useful in methods where the markings are used to identify characteristics of the lens.
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 April 2, 1998 and granted June 10, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 2, 2020.
- 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.