Dentifrice composition
CA 2025881 C · Owner: Mori, Shigeki · Inventors: Mori, Shigeki; Yokosuka, Naomi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present application is directed to a dentifrice composition stably containing cetylpyridinium chloride. The composition has improved shape retention at low temperatures and is in the form of an aqueous gel. The composition comprises 15 to 80% by weight of a polyoxyethylenepolyoxypropylene block copolymer surfactant based on the total weight of the composition, 0.001 to 5% by weight of cetylpyridinium chloride based on the total weight of the composition, and polyethylene glycol having an average molecular weight of 2,000 to 20,000 in a proportion of 1/200 to 1/4 based on the weight of the polyoxyethylenepolyoxypropylene block copolymer.
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 September 20, 1990 and granted October 31, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 2012.
- 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.