Burners with reduced pollutant emission
CA 2073223 A1 · Owner: Czajka, Erich · Inventors: Herfeldt, Arne; Stutzenberger, Werner; Czajka, Erich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A burner for low-pollution combustion of a fuel with an oxidation agent is proposed whereby according to the present invention the end of each supply duct for the fuel projects by a section of the length L beyond the end of each supply duct. This allow successive combustion as well as aspiration of furnace waste gases for reduction of the flame temperature, so as to avoid in particular the formation of nitrogen oxide. Emission of pollutants is further reduced by conical widening of the outer side of the end piece of this supply duct.
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 July 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 2014.
- 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.