Polylactic acid scleral plugs
CA 2294714 A1 · Owner: Santen Pharmaceutical Co. Ltd. · Inventors: Ogura, Yuichiro; Ota, Atsutoshi; Kunou, Noriyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Scleral plugs by which drugs can be accurately released in a specified amount to the end. The plugs are made from a mixture of a high-molecular weight polylactic acid having a molecular weight of 40,000 or more with a lowmolecular weight polylactic acid having a molecular weight of 40,000 or less and contain drugs for treating or preventing retinal or hyaloid diseases. The mixing ratio of the high-molecular weight polylactic acid to the low-molecular weight polylactic acid preferably ranges from 90/10 to 50/50 still preferably , from 90/10 to 70/30 the most desirable ratio thereof being 80/20. The molecular weight of the high-molecular weight polylactic acid preferably ranges from …
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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 June 30, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 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.