Tampon
CA 2286104 A1 · Owner: Sanger, Nigel · Inventors: Whyte, Carolyn; Sanger, Nigel; Albright, Mark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tampon is provided with a permeable or soluble barrier layer interposed between an absorbent core and an overwrap allowing substantially complete, uniform wetting to be obtained even under light flow conditions. The barrier prevents immediate flow of fluid into the core allowing time for fluid to be , carried by the overwrap around the outer surface of the tampon prior to being , drawn into the absorbent core.
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 April 13, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 13, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 13, 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.