Nasal mask
CA 2177524 C · Owner: Handke, Patrick M. · Inventors: Wong, Doris; Handke, Patrick M.; Starr, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A miniature nasal mask for supplying breathing gas to a human user through an interface with the user's nares the interface being maintained by a contact seal which engages the user's face only within an area between the tip and immediately adjacent lateral flanks of the user's nose adjacent to the nares and the user's upper lip.
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 28, 1996 and granted December 3, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 28, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 28, 2018.
- 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.