Tooth whitening product comprising a film and a solid whitening agent coating
CA 2745716 C · Owner: The Procter & Gamble Company · Inventors: Sagel, Paul Albert; Mcclanahan, Stephen Francis; Barron, Robert Eugene
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tooth whitening product is provided. The tooth whitening product includes film formed from a water hydratable polymer and a plasticizer. The film has a first side and a second side and a tooth whitening agent applied as coating to one side of the film.
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 September 11, 2003 and granted July 8, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 11, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 2025.
- 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.