System for feeding combustion air in a soda recovery boiler
CA 2442011 C · Owner: Kvaerner Power Oy · Inventors: Maentyniemi, Jussi; Ruohola, Tuomo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and a system for feeding combustion air of a soda recovery boiler to a furnace (7) in which the air is fed to the boiler furnace (7) as primary air jets (5) and auxiliary air jets (6) which are substantially shorter than the primary air jets. According to the invention at least one primary air jet (5) is placed between two opposite auxiliary air jets (6).
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 September 22, 2003 and granted August 23, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2025.
- 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.