Extensible and retractable face mask
CA 2426149 A1 · Owner: Elsberg, Laura L. · Inventors: Elsberg, Laura L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided a face mask (10) having a mask portion that is extensible and retractable in at least one direction to improve the overall comfort and fit of the mask. The mask portion (22) may be a composite of several materials or layers (44, 46, 48, 50) joined by any conventional process provided that , the composite is extensible and retractable. At least one of the materials and/or layers (46) has properties of stretch and recovery that are imparted to the mask portion to render the mask portion extensible and retractable overall.
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 November 13, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 13, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2023.
- 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.