Arrangement and method for treatment of cellulose pulp involving means for seal adjustment
CA 2609285 C · Owner: Lundberg, Jorgen T. · Inventors: Mattsson, Stefan; Bylander, Johan; Lundberg, Jorgen T.
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 washing arrangement (100) for washing and dewatering of cellulose pulp, comprising a rotatable drum (10) having a plurality of outer compartments (12) on the drum for the pulp to be washed which compartments are defined by axial compartment walls (12b) distributed along the circumference of the drum, a stationary cylindrical casing (20) that encloses the drum, whereby an annular space (30) is defined between the casing and the drum and, where the annular space by longitudinal seals (40) in the axial direction of the drum is divided in zones (F Tl, T2, U) for forming, washing and discharge of the pulp. The function of the longitudinal seals is optimized by …
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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 May 31, 2006 and granted December 11, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 31, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.