Abrasive particles based on aluminium oxynitride
CA 2477162 C · Owner: Bourlier, Florent · Inventors: Bourlier, Florent
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to abrasive particles based on aluminium oxynitride with an equivalent weight content of AlN measured on a pseudo-binary Al¿2?O¿3?-AlN diagram of between 2.5 % and 7.5 % inclusive preferably 3 to 6 % and a structure comprising for the larger part AlON ~ and AlON .gamma.. Said abrasive particles are particularly of use in the production of grinding wheels abrasive papers and cloths, polishing pastes and spraying abrasives.
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 February 24, 2003 and granted May 22, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 24, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 24, 2025.
- 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.