Light-activated tooth whitening composition and method of using same
CA 2750101 A1 · Owner: Britesmile Professional, Llc · Inventors: Nathoo, Salim A.; Prey, John E.; Williams, Michael A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a tooth whitening composition having a transparent first component that is a carrier compound and a transparent second component that is an oxidizing compound which when applied to a stained tooth and exposed to actinic light is activated to facilitate tooth whitening. The invention also provides a method for light-activated tooth whitening which comprise applying a tooth-whitening composition to one or more teeth and exposing said composition to actinic light to activate said oxidizing compound. The present invention further provides a device for tooth whitening which has a light source, at least one optical output a projection , means for holding and …
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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 February 12, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 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.