Therapeutic agent delivery device with controlled therapeutic agent release rates
CA 2520446 C · Owner: Parker, Theodore L. · Inventors: Parker, Theodore L.; Shanley, John F.
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 implantable medical devices for the localized delivery of therapeutic agents, such as drugs to a patient. More , particularly, the invention relates to a device having a gradient of water soluble therapeutic agents within a therapeutic agent layer and a mixing layer that allows for controlled release of the therapeutic agents.
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 March 29, 2004 and granted December 10, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 29, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 29, 2026.
- 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.