A method for sustained and extended corneal analgesia
CA 2181048 C · Owner: Shahinian, Lee, Jr. · Inventors: Shahinian, Lee, Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for sustained and extended corneal analgesia by repeated administration of ophthalmic analgesic solutions or preparations containing ultralow nontoxic concentrations of local anesthetic agents. A method for corneal analgesia has a fast onset of pain relief and extended duration of the corneal analgesia for several months without accompanying toxic symptoms by administering to a patient an ophthalmic analgesic solution containing a local anesthetic agent in ultralow concentration between about 0.001 % and about 0.05 %.
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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
- Filed January 13, 1995 and granted May 6, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 13, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 2017.
- 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.