Artificial pancreatic perfusion device with reseedable matrix
CA 2107119 A1 · Owner: Chick, William L. · Inventors: Chick, William L.; Rupp, Randall G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device which serves as an artificial pancreas comprises a hollow fiber (12) which is surrounded by islets of Langerhans (14) enclosed in a housing (22). The islets are suspended in a semi-gel matrix (25) or supporting material that is sufficiently viscous to physically support and maintain location of the islets about the hollow fiber, but sufficiently fluid to enable removal of the islet suspension from the device, followed by reseeding or replacement with fresh islet suspension. The matrix in which the islets are suspended preferably comprises calcium sodium alginate. The semi-gel supporting material also enables long term maintenance of islet cells in in vitro culture.
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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 March 24, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 24, 2014.
- 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.