Prophy mouthfeel dentifrice having low rda value
CA 2072833 C · Owner: Colodney, Daniel · Inventors: Colodney, Daniel; Thomas, Kathleen Patricia
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dentifrice composition having an RDA value less than 150 which provides a prophy mouthfeel to the user thereof during toothbrushing, the dentifrice comprising a vehicle having dispersed therein a siliceous polishing agent having a particle size distribution of about 1 to about 100 microns wherein (1) more than 25% of the particles have a size greater than about 40 microns and (2) at least about 10% of the particles of (1) have a particle size greater than about 60 microns and at least about 5% of the particles have a particle size greater than about 80 microns.
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 June 30, 1992 and granted April 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 2014.
- 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.