Oral composition providing enhanced tooth stain removal
CA 2431714 C · Owner: Prencipe, Michael · Inventors: Gebreselassie, Petros; Hoic, Diego A.; Masters, James G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An abrasive dentifrice composition which effects enhanced tooth stain removal which comprises an orally acceptable vehicle containing a combination of a low oil absorption silica abrasive having an oil absorption value of less than 100cc/100g silica and an proteolytic enzyme.
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 October 23, 2001 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 23, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 23, 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.