Expired Canadian patentCanada
Abrasive products
CA 2203427 C · Owner: Norton Company · Inventors: Kelly, Robert G.; Kardys, Gary J.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Coated abrasive materials can be made from a backing material andabrasive elements which comprise abrasive particles adhered to a rigid base material said elements being rigidly adhered to the backing material in a predetermined pattern.
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 August 9, 1995 and granted May 23, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 9, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 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.
FiledAugust 9, 1995
GrantedMay 23, 2000
Term endedAugust 9, 2015
Patent numberCA 2203427 C
Classification (IPC)B24D13/14 +1 more
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.