An anaesthetic vaporiser
CA 2108553 A1 · Owner: The Boc Group Plc · Inventors: Kersey, Clifford Graham
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An anaesthetic vaporiser comprises an inlet for a carrier gas an, outlet for carrier gas and anaesthetic agent and a pump for, delivering a quantity of an anaesthetic agent into a stream of carrier gas, the pump comprising (a) a chamber having an inlet port (37), a reservoir port (32) and an outlet port (41); (b) a valve member (31) which can be moved between a first position in which anaesthetic agent can flow through the chamber between the inlet port and the reservoir port, and a second position in which the agent can flow through the chamber between the reservoir port and the outlet port; (c) a reservoir (38) connected to the reservoir port in which the agent can be retained prior to …
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 April 24, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 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.