Anti-staining anti-bacterial oral composition
CA 2052979 A1 · Owner: Colgate-Palmolive · Inventors: Polefka, Thomas G.; Gaffer, Abdul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oral composition is provided which comprises an oral vehicle and contains at least one antibacterial antiplaque agent which can stain or discolor dental surfaces. Provided in such oral composition is an effective stain-inhibiting amount of an antistaining additive such additive being azacycloalkane disphosphonic acid or an orally acceptable salt thereof.
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 8, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2013.
- 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.