Implantable refillable and rate controlled drug delivery device
CA 2431688 A1 · Owner: Control Delivery Systems · Inventors: Shimizu, Robert W.; Watson, David A.; Laporte, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Implantable, refillable, rate controlled drug delivery is disclosed that includes a base structure (120) having at least a first opening and a second opening, the base structure defining a chamber (160) a septum (110) covering , the first opening and configured to substantially prevent leakage from the first opening to an exterior of the device a drug delivery tube (130) , comprising a first and second distal end wherein the first distal end of the , tube communicates with the chamber through the second opening and at least , one rate-limiting permeable membrane (150) disposed across a passage between the base structure and the second distal end of delivery tube which membrane , …
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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 December 13, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 13, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2023.
- 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.