Precipitated silicas, process for producing same and their use
CA 1331503 C · Owner: Nauroth, Peter · Inventors: Becker, Adam; Reinhardt, Helmut; Kuhlmann, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing silicas having a cleaning polishing and thickening effect and being intended for use as dentifrices. This process is characterized in that the silicas obtained in a conventional manner by precipitation and having varying particle sizes and particle densities are homogeneously mixed with each other in the suspension phase and that the mixtures are further treated in the usual manner by filtering, drying and grinding.
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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
- Granted August 23, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 23, 2011.
- 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.