Abrasive article
CA 2120660 A1 · Owner: Minnesota Mining And Manufacturing Company · Inventors: Beardsley, Kris A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an abrasive article for abrading material from a workpiece. In one embodiment, the abrasive article includes a back-up pad having first and second major surfaces. The first major surface includes a shaft adapted to connect the abrasive article to an abrading apparatus for movement relative thereto. Adjoining the second major surface are first and second resilient support portions, to which are attached first and second abrading members, respectively. When an operator applies a first force to the abrading apparatus the first abrasive surface contacts and abrades the workpiece. When the operator applies a second force that is greater than the first force, both …
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 April 6, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 6, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 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.