Anaesthetic vaporisers
CA 2039075 C · Owner: The Boc Group Plc · Inventors: Leach, Stuart Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An anaesthetic vaporlser includes a passagevay 10 30 for directing, carrier gas through a fixed laminar restrictor 32 to a vaporising chamber 26. Liquid anaesthetic agent ls injected into the vaporising chamber 26 from a constant level tank 12 the output of vhich is controlled by a laminar control valve 28. Liquid anaesthetic agent flov is determined by the pressure of carrier gas in the passagevay 10, 30 and the setting of the liquid laminar control valve 28.
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 March 26, 1991 and granted February 13, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2013.
- 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.