Stabilized peroxide gels containing fluoride
CA 2130609 C · Owner: Ryles, Christine W. · Inventors: Ryles, Christine W.; Barrow, Stephen R.; Williams, David R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oral composition and method is provided that includes a peroxygen compound such as hydrogen peroxide, a fluoride-containing anticaries agent and a zinc compound such as zinc citrate. The presence of the zinc compound inhibits decomposition that ordinarily would be induced by the presence of fluoride.
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 August 22, 1994 and granted March 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 22, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 22, 2016.
- 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.