Peritoneal dialysis system
CA 2134206 C · Owner: Villeneuve, Richard R. · Inventors: Kamen, Dean; Villeneuve, Richard R.; Vincent, Douglas E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Peritoneal dialysis systems and methods move liquid using a pump chamber (P1 P2) that is operated in response to pneumatic pressure variations applied by a pump actuator (PA1 PA2). The systems and , methods periodically measure air pressures in the actuator (PA1; PA2) and an associated reference air chamber (VS1 VS2) and derive from , these a measurement of liquid volume moved through the pump chamber (P1, P2). The systems and methods minimize derivation errors by compensating for temperature differences among the pump chamber (P1, P2); the pump actuator (PA1 PA2); and the reference chamber , (VS1 VS2).
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 28, 1994 and granted October 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 2016.
- 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.