Cardioplegia delivery apparatus and method of use
CA 2188573 C · Owner: Witherspoon, Leland · Inventors: Witherspoon, Leland; Akopian, Paul; Buckberg, Gerald D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is a cardioplegia de-, livery device (10) for providing variable ratio delivery of blood and cardioplegia solution to a patient. The device includes separate pumps (16, 18) for crystalloid and blood. A heat exchanger control circuit is provided which includes a heater (114) and an ice bath (88) for warming or cooling the cardioplegia fluid delivered to the patient. The heat exchanger control circuit includes a priming circuit which may be used to purge air bubbles from the circuit.
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 February 20, 1996 and granted January 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 20, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 20, 2018.
- 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.