Process for the purification of waste gases emitted from melting furnaces
CA 2085565 A1 · Owner: Ercole, Pietro · Inventors: Ercole, Pietro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improvement of the process of abatment of pollutants present in waste gases emitted from melting furnaces for the production of glass consisting in the fact that, during the cooling carried out by quenching with water, conditions are created favorable to oxidation of present SO2 and to form stable Na2SO3, during the filtration to, absorption of SO3 and SO2 on the cake of sodium sulfate present on the filter.
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 December 16, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 16, 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.