Roll with surface coating
CA 2288110 A1 · Owner: Orebro Golvindustri Ab · Inventors: Roos, Anders
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Rolls (2) provided with a rubber layer are used in grinding machines (1). According to the present invention this layer consists of a number of sectorlike units (9), the lower end of each unit (9) being inserted in a groove (3) in the surface of the roll. This avoids the whole layer having to be replaced it being sufficient instead to replace one or more units (9).
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 20, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 20, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 2020.
- 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.