Starch thickened non-aqueous dentifrices
CA 2394865 A1 · Owner: Chadwick, Thomas C. · Inventors: Pineda, Rachel; Chadwick, Thomas C.; Ibsen, Robert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The instant invention relates to an anhydrous dentifrice (toothpaste brushing , gel, etc...). The dentifrice is a homogeneous mixture of the following compounds: (1) organic polyols, such as glycerin; (2) cooked starch gelling agents; (3) mildly abrasive fillers such as silica alumina and dicalcium , phosphate; and optionally, (4) compounds selected from the group consisting of anticaries agents, anti-plaque agents anti-calculus agents, bleaching , agents peroxide stabilizers, desensitizing agents whiteners, anti-stain , agents, breath fresheners flavorants, sweeteners, colorants, buffers surfactants, and anti-bacterial agents with the proviso that if bleaching , agents are employed then …
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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 December 21, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2022.
- 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.