Breathing mask
CA 2274992 C · Owner: Drager Sicherheitstechnik Gmbh · Inventors: Drews, Ralf; Kintzel, Hartmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Protective respirator with a connector housing (1) for mask components with a mask body (2) that can be joined to the connector housing said mask body (2) being of elastomer material a connecting surface that extends peripherally round the connector housing (1) for a profile-reinforced cutout of the mask body that is shaped to match this and with a connecting device that fixes the cutout on the connecting surface is to be so configured that the connection between mask body (2) and connector housing (1) can be effected in a simple manner. This objective has been achieved in that the connecting surface is in the form of a disk-like edge (5) that extends from the connector housing (1); in that …
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 June 15, 1999 and granted October 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 15, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 2021.
- 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.