Method for reducing emissions of detrimental nitrogen compounds
CA 2266492 A1 · Owner: Janka, Kauko · Inventors: Janka, Kauko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for reducing emissions of detrimental nitrogen compounds from the chemical cycle of a pulp mill. The method comprises supplying ammoniacontaining vent gases separated from salt smelt to the furnace of a boiler (1 10) at a point where the fuel has mainly burnt whereby the ammonia reacts , with the nitrogen oxide present in the furnace to form molecular nitrogen.
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 19, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 19, 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.