New partial denture cleanser with fluoride
CA 2250148 C · Owner: Block Drug Company, Inc. · Inventors: Quast, Marco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention comprises a dental cleanser for the cleaning of partial dentures with the added benefit of providing fluoride protection to the wearer's natural teeth when the denture is subsequently placed back in the mouth. Preferably, the cleanser will be provided in a two-layer tablet with a peroxy bleach cleanser contained in one layer and the sustained release fluoride source in the other. The composition may also be applied as a paste cream, mouthwash or gel however.
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 March 24, 1997 and granted January 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 24, 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.