Anticalculus dentifrice containing highly soluble pyrophosphate
CA 2246348 C · Owner: Warner-Lambert Company · Inventors: Yu, Dahshen; Talwar, Anil Kumar; Harper, David Scott
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An anticalculus dentifrice composition containing an antimicrobially effective amount of an antimicrobial agent selected from the group consisting of thymol eucalyptol, methyl salicylate and mixtures thereof and a pyrophosphate ion in , an amount from about 0.1 % to less than about 1.5 % by weight of the composition, the pyrophosphate ion being derived from a highly soluble alkali metal pyrophosphate salt. The composition exhibits both antimicrobial and anticalculus efficacy at low levels of pyrophosphate ion even in the substantial absence of anticalculus enhancing agents.
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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 January 2, 1997 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 2, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 2, 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.