Respiratory gases
CA 2132268 A1 · Owner: Invacare Corporation · Inventors: Enterline, Jack Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a respiratory gas dispensing apparatus for delivering a precise volume of respiratory gas to a patient within less than about half of an inspiratory effort comprising a source of respiratory gas in operative communication with a valve means capable of releasing a pulsed dose of respiratory gas in synchronization with the initiation of the inspiratory effort wherein the volume of the pulsed dose is constant throughout an entire pulse period. The invention further relates to a method of using the subject apparatus and, to the valve means contained in the subject apparatus.
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 September 16, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 16, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 16, 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.