Dental bleaching composition and method
CA 2272286 A1 · Owner: Sibner, Jeffrey A. · Inventors: Sibner, Jeffrey A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dental bleaching composition having enhanced effectiveness and reduced sensitivity, its method of use, and a kit containing the ingredients for making the composition. The dental bleaching composition is in the form of a gel with a pH of about 9 to 11 and comprises a bleaching agent such as hydrogen peroxide, an inert gelling material such as silica compounds a pH , modifier such as sodium hydroxide and a discrete inert particulate material capable of absorbing the emitted laser light and retransmitting it as thermal energy. The dental bleaching composition is placed on the teeth to be bleached, exposed to laser energy, and removed. The process is then repeated until the desired …
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 November 26, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2019.
- 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.