Pulper
CA 2018175 C · Owner: Valmet Corporation · Inventors: Hautala, Jouko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a pulper for, breaking materials containing fibre pulp more particularly for breaking materials containing paper pulp or corresponding. It comprises a feed chamber (2) restricted by the pulper housing (1), a rotor unit (3) or corresponding in the feed chamber (2) adapted to be moved by means of a drive unit, a screenplate (6) with perforations (5) in connection with the rotor unit (3) or corresponding and a space (8), restricted by a housing (7) or corresponding and situating on the, opposite side of the perforated screenplate (6) as seen from the rotor unit (3) or corresponding for receiving the broken material. The space (8), consists of a screening unit (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 June 4, 1990 and granted January 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2012.
- 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.