Combustion method
CA 1257809 A · Owner: Ahlstrom (A.) Corporation · Inventors: Hakulin, Bertel; Ruottu, Seppo; Engstrom, Folke
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a two-staged combustion method based on fluidized bed technique the fuel is supplied into a first circulating bed system operating under reducing conditions in which solids contained in the flue gases discharged from the reactor are separated and recycled into the reactor. The gases are introduced into a second circulating bed system into the, reactor of which gas containing oxygen is supplied.
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
- Granted July 25, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 25, 2006.
- 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.