Controlled release of miotic and mydriatic drugs in the anterior chamber
CA 2216417 C · Owner: O.I.I. International, Inc. · Inventors: Salamone, Joseph C.; Galin, Miles A.; Israel, Stanley C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to compositions which maintain the structural integrity of the anterior chamber of the eye during ophthalmologic surgery thereby protecting the tissues that form and line the anterior segment from potential damage and simultaneously providing sustained delivery of a miotic or mydriatic agent. The present invention provides for compositions which comprise a viscoelastic polymer, wherein sustained release of a miotic or mydriatic agent is mediated by ionic interactions as well as for compositions , wherein sustained release of a miotic or mydriatic agent is mediated by microcapsules or copolymer micelles.
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 18, 1996 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 18, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 18, 2018.
- 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.