Fining abrasive materials
CA 2205220 C · Owner: Norton Company · Inventors: Darjee, Dhiraj H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coated abrasive suitable for fining operations on contoured surfaces is obtained by depositing an abrasive/bond mixture in a discontinuous pattern on the surface of a backing that is stretchable in such a fashion that the finished product remains stretchable.
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 December 19, 1995 and granted April 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2017.
- 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.