Precipitated silicon dioxide abrasive compositions having superior compatibility with anti-plaque and therapeutic fluoride agents for dentifrice applications; dentifrice thereof; and method for making the same
CA 2002532 A1 · Owner: J. M. Huber Corporation · Inventors: Fultz, William C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PRECIPITATED SILICON DIOXIDE ABRASIVE COMPOSITIONS HAVING SUPERIOR COMPATIBILITY WITH ANTI-PLAQUE AND THERAPEUTIC FLUORIDE AGENTS FOR DENTIFRICE APPLICATIONS; DENTIFRICE THEREOF; AND METHOD OF MAKING THE SAME, ABSTRACT, Novel precipitated silicon dioxide abrasive compositions which can be incorporated into therapeutic toothpaste compositions containing soluble fluoride salts and anti-plaque, anti-microbials are disclosed. The abrasives comprise low structure precipitated silicon dioxides which have been reacted with about 10 to 300 parts per million alkaline earth metal ion particularly calcium, have a sulfate ion less than 0.25% and an adjusted pH of 4.0 to 7.5. Also provided are methods …
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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
- Filed November 8, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 8, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 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.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.