Composition and method of preventing tartar formation
CA 1264672 C · Owner: Tikkanen, Matti Haakon August · Inventors: Tikkanen, Matti Haakon August
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Tartar formation on teeth is prevented with compositions of a sodium salt ethylenediaminetetraacetic acid having a pH between about 5.5 and 9.0 in a carrier which permits application to the teeth. Aqueous solution may be used for this purpose as well as toothpaste compositions.
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 January 23, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 2007.
- 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.