Mask arrangement
CA 1286850 C · Owner: Markert, Allen R. · Inventors: Markert, Allen R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mask arrangement particularly adapted for use in cold weather conditions includes a mask member and a spaced eye shield. Air flow directing means directs air flow between the eye shield and the mask member, providing comfortable air flow and inhibition to fogging of the eye shield. The mask member is divided into a vision region and a breathing region. The vision region includes a port therein covered by the eye shield. The breathing region is generally isolated from the vision region and includes a breathing aperture with baffle means associated therewith. In a preferred embodiment, the breathing aperture comprises a large aperture in the central portion of the breathing region with the …
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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
- Granted July 30, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 30, 2008.
- 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.