Method of utilizing dusts incurring in the reduction of iron ore
CA 2211182 C · Owner: Schrey, Gunter · Inventors: Zettl, Franz; Grunbacher, Herbert; Zettl, Stefan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
22, Method of Utilizing Dusts Incurring in the Reduction of Iron Ore In a method of effectively utilizing dusts incurring in the reduction of iron ore by means of a, reducing gas and separated on that occasion in a scrubber in the form of sludges, the sludges at, first are dehydrated and are used as starting materials for the production of cement.
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 January 24, 1996 and granted May 27, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 24, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 24, 2018.
- 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.