Liquid tooth cleaning agents
CA 2337501 A1 · Owner: Walther-Stangrecki, Claudia · Inventors: Pastura, Amerigo; Walther-Stangrecki, Claudia; Wulknitz, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Liquid tooth cleaning agents containing the following ingredients: 5-15 wt. % precipitated silicic acid with an average particle size of 8-14 µm and a specific surface of 40-75M2/g (BET) in addition to a low thickening characteristic, 20-55 wt. % glycerin, sorbite or a mixture thereof and 0.3-, 1.0 wt. % xanthan gum as a binding agent whereby the viscosity thereof ranges , from 10-100 Pa. The inventive tooth cleaning agents have a flow point of at least 10 Pa yet begin to flow easily at a low shear force e.g. when pressure is exerted on a flexible dispenser.
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
- Filed July 3, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 3, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 3, 2021.
- 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.