A method and device for treating fibre material
CA 2117076 C · Owner: Sunds Defibrator Industries Aktiebolag · Inventors: Fredriksson, Borje; Forslund, Kjell
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and a device for the admixing of treating agent to a pulp suspension. The pulp and agent are supplied through inlets (3 and 5) to a housing (1) with a chamber (10) comprising a substantially cylindric rotor (2). The mixing is carried out in a mixing zone (11) where the pulp is subjected to kneading between mixing members (6) on the rotor (2) and stationery treating members (12) in the chamber (10). After mixing the pulp is discharged through , an outlet (4).
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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 19, 1992 and granted December 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 2014.
- 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.