Pulp heating apparatus
CA 2372303 A1 · Owner: Aikawa Iron Works Co. Ltd. · Inventors: Aikawa, Yoshihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pulp heating apparatus has a heater main body 1 which has a pulp introduction port for introducing pulp a vapor, introduction port for introducing vapor a disperser for, dispersing the pulp introduced via the pulp introduction port under a high temperature and a pulp exhaust port for exhausting the pulp dispersed by the disperser and is arranged in a horizontal direction. The disperser has a spiral vane section which continues spirally around a rotational shaft and discontinuous vane sections around the rotational shaft. The pulp introduction port is provided at a bottom section of the heater main body and is connected to an introduction passage. A screw conveyor is provided on the …
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 February 21, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 21, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 21, 2024.
- 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.