Compositions for removing stains from dental surfaces, and methods of making and using the same
CA 2493514 C · Owner: Warner-Lambert Company · Inventors: Holme, Samantha K.; Luo, Shiuh John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition for removing stains from dental surfaces comprising a stain removing effective amount of at least two active components selected from a peroxide compound, a polyphosphate, and an anionic surfactant in combination , with an orally acceptable carrier. The present invention is further directed to methods of making and using the same.
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 28, 2003 and granted April 23, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 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.