Removable lung reduction devices, systems, and methods
CA 2459702 C · Owner: Alferness, Clifton A. · Inventors: Gonzalez, Hugo X.; Alferness, Clifton A.; Dillard, David H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An air passageway obstruction device (80) includes a frame structure (86) and a flexible membrane (112) overlying the frame structure (86). The frame structure (86) is collapsible upon advancement of the device (80) into the air passageway, expandable into a rigid structure upon deploying in the air passageway and recollapsible upon removal from the air passageway. The flexible membrane (112) obstructs inhaled air flow into a lung portion communicating with the air passageway. The device(80) may be removed after deployment in an air passageway by recollapsing the device (80) and pulling the device (80) proximally through a catheter.
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 August 9, 2002 and granted May 8, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 9, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 2024.
- 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.