Dentifrice for hypersensitive teeth
CA 1254150 A · Owner: Wurttembergische Parfumerie-Fabrik G.M.B.H. · Inventors: Scheller, Hans-Ulrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A dentifrice for hypersensitive teeth containing at least 15% by weight of an apatite having an average particle size of less than 8 µm and an abrasion value (RDA) of less than 30 as the sole crystalline and polishing substance. No further soluble mineral salts are present in the dentifrice. The dentifrice may also contain a local anesthetic.
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
- Granted May 16, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 16, 2006.
- 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.