Anaesthetic vaporisors
CA 1302836 C · Owner: Heaton, Robert Anthony · Inventors: Hancock, Joseph; Heaton, Robert Anthony; 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 vaporiser 1 the by-pass type includes a thermally responsive valve 52 in its second by-pass stream which valve 52 is located immediately below the sump 12 of the vaporiser. This offers the advantage that any difference in temperature between the valve 52 and liquid anaesthetic contained in the sump 12 is very small even when the liquid anaesthetic temperature is changing rapidly. Furthermore the valve 52 is readily accessible for maintenance and calibration.
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
- Granted June 9, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 2009.
- 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.