Abrasive system for dentifrices
CA 1095423 A · Owner: Colgate-Palmolive Company · Inventors: Norfleet, James; Cordon, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dentifrice comprising from 7.5% to 75% by weight of calcium pyrophosphate having a mean particle diameter in the range from 1 to 15 microns and which has been pretreated with a non-toxic inorganic zinc compound in an amount to provide at least 0.0065% by weight zinc to the dentifrice the amount of the zinc compound in the dentifrice being up to 1% by weight to, reduce the enamel abrasivity, the dentifrice containing calcium pyrophosphate pretreated with a non-toxic inorganic zinc compound as providing superior polishing action without undue enamel abrasivity.
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 February 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 10, 1998.
- 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.