Anti-fog face mask
CA 2321646 A1 · Owner: Minnesota Mining And Manufacturing Company · Inventors: Scholz, Matt T.; Dunshee, Wayne K.; Dowdell, Shannon L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A face mask (10) is disclosed that includes a mask portion (16) a resilient , member (12) (e.g. a pillowed web) and, optionally, an adhesive portion (22). The resilient member (12) and the adhesive portion (22) are alternately positionable between the mask portion and the wearer to inhibit the passage of vapor between the mask and the wearer, which prevents fogging of the wearer's eyewear. A method for using the face mask is also disclosed.
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 September 1, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 1, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 1, 2020.
- 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.