Double lumen catheter
CA 1112972 A · Owner: Van Endert, Gunter · Inventors: Tersteegen, Bernd; Van Endert, Gunter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A double lumen catheter suitable for providing a vessel, entry for extra-corporal hemodialysis is disclosed. The catheter has an internal cannula providing an inner passage for a blood inflow and an external cannula surrounding the internal cannula to provide an annular passage for the outflow of blood. The forward end of the external cannula is bevelled and honed for entry into the vessel and the internal cannula is slidable within the external cannula.
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
- Granted November 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 24, 1998.
- 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.