Heat exchanger
CA 2257207 A1 · Owner: Metso Paper, Inc. · Inventors: Heikkila, Pertti
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a heat exchanger for use in particular in connection , with the process outlets at paper pulp and board mills, which heat exchanger comprises a number of substantially parallel tubes (11) or equivalent fitted , in a duct (12), through which tubes or equivalent the air flow (23) that delivers heat is fitted to pass, and the air flow that receives heat (21) is fitted to pass through the gaps between said tubes (11) in accordance with the cross-flow principle. The heat faces of the tubes (11) have been made larger at the side of the flow that receives heat by means of ribs lamellae or , equivalent, and an air that is moist saturated, or near the saturation curve is …
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, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 4, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2019.
- 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.