Refiner
CA 2528398 C · Owner: Vuorio, Petteri · Inventors: Kaarineva, Matti; Vuorio, Petteri
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A refining surface for a refiner intended for defibrating lignocellulosecontaining material, the refiner comprising at least two refining surfaces (1 2) arranged coaxially relative to each other at least one of which rotates , around a shaft and between which the material to be defibrated is fed. The refining surfaces (1, 2) comprise grooves and between them ridges (11) at , least part of the refining surface (1 2) ridges (11) being formed of at least two different ridge parts (11a, 11b) connected to each other in such a way that one ridge part (11a, 11b) is farther ahead in the rotation direction of the refining surface (1, 2) than the other ridge part (11a 11b). Further, at , least in …
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 June 10, 2004 and granted January 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 10, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 2026.
- 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.