Tongue cleaning device
CA 2394842 A1 · Owner: Wang, Ping · Inventors: Feng, Boru; Buckley, Christopher David; Chan, John Geoffrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a tongue cleaning device comprising a body having a handle and at one end thereof a head provided with a plurality of convex extrusions on at least one side of the head. Also disclosed is a tongue cleaning device comprised of a body having a handle and at one end thereof a head provided with at least one raised ridge. Also disclosed is a device wherein the head is further provided with tooth-cleaning bristles on the side of the head that is opposite to the side that is provided with the convex extrusions or with the at least one raised ridge. Still further disclosed is a tongue cleaning device comprised of a body having a handle and at one end thereof a head provided …
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 December 22, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2021.
- 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.