Method and apparatus for treating material having poor thermal conductivity
CA 2318878 A1 · Owner: Andritz-Ahlstrom Oy · Inventors: Peltonen, Kari; Henricson, Kaj
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method and an apparatus for heating or cooling material having poor thermal conductivity especially medium-, consistency fibre suspensions. The material is directed substantially as a , plug flow, through an apparatus formed by a flow channel (12) provided with heat exchange surfaces. The flow of the material is throttled at a throttling point by means (16, 18) for throttling the cross-sectional area of the chanel. After throttling, the material is discharged from the throttling point in such a manner that another portion of the material is introduced on the heat exchange surfaces.
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 January 28, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 28, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2021.
- 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.