Toothpaste
CA 2132014 C · Owner: Baffelli, Gianni · Inventors: Von Weissenfluh, Beat A.; Baffelli, Gianni
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The toothpaste proposed contains as an abrasive preferably as the sole abrasive, expanded perlite generally, with a particle size in the range 1 to 150 µm in particular, with a main fraction in the region of 20 µm. This gives enhanced cleaning power, and improved protection of the tooth enamel against wear and scratching.
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 January 5, 1994 and granted July 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 5, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 5, 2016.
- 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.