Process of sintering iron oxide-containing materials on a sintering machine
CA 2079766 A1 · Owner: Werz, Hans-Joachim · Inventors: Weisel, Heiko; Schmidt, Hermann; Werz, Hans-Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sinterable mixture comprising iron-containing materials and solid fuel is sintered on a sintering machine. To decrease the rate at which exhaust gas is to be removed and nevertheless to produce a good sinter, a part of the exhaust gas is enriched to an oxygen content of up to 24% by an addition of higher oxygen gases and is then recirculated as a recycle gas and exhaust gas is removed as a tail gas from the process only at a rate which corresponds to the rate of the gas which is formed during the sintering process plus the rate of the gas added for enriching plus the rate of inleaked air which has infiltrated from the outside minus the rate of oxygen consumotion.
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 October 2, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 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.