Pressure-relieving device and process for implanting
CA 2045178 C · Owner: Smith, Stewart Gregory · Inventors: Smith, Stewart Gregory
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention involves a porous device (11) for implantation in the scleral tissue (12) of the eye to relieve the intraocular pressure of glaucoma and a method for surgically implanting the device (11). The porous implant device (11) has an overall hexahedral shape and is surgically implanted within the scleral tissue (12) of the eye with at least one edge of the device at an opening (16) entering the anterior chamber (14) with no substantial extension , into the anterior chamber (14) to provide efficient drainage of aqueous fluid from the anterior chamber (14) for longer periods of time to provide intraocular pressure relief and prevent adverse effects of glaucoma.
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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 October 26, 1990 and granted December 31, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2012.
- 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.