Mask with improved cushion and method of using same
CA 2386686 A1 · Owner: Fitzsimmons, James L. · Inventors: Sleeper, Geoffrey P.; Cichon, Norbert E.; Fitzsimmons, James L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nasal CPAP treatment apparatus is disclosed with a flow generator coupled to a, nasal mask. The mask has a nasal cushion forming a nose-receiving cavity. The cushion has, a triangularly-shaped frame of resilient material with a mask engaging portion connected by a, side wall to a face engaging portion which has a nasal bridge region a cheek , region and a lip, region. The cushion may have a portion of the side wall in the nasal bridge region being, other than straight to provide an improved sealing in the nasal bridge region. A plurality of, membranes, preferably three of resilient material extend substantially around the, triangularly-shaped frame. Some of the membranes are thicker …
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 May 17, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 17, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 2024.
- 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.