Breathing mask
CA 2184330 C · Owner: Von Kopp, Gunter · Inventors: Drews, Wolfgang; Dahrendorf, Klaus-Dieter; Siegel, Joachim W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A breathing mask with a mask body designed as a full mask with a field of vision and with a filter with a filter connection 13 wherein the filter can be arranged in the middle 3 of the mask body or to the side of it in the cheek area is to be improved such that the use properties with the filter attached are improved in terms of the position of the center of gravity a larger field of vision is present, and there is good adaptability to optical devices. To accomplish this task the filter is designed as a cassette filter extending in the shape of a U from the middle of the mask body to the cheek area and the field of vision includes a transparent elastic elastomer section, into which …
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 August 28, 1996 and granted November 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 28, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 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.