Melting aggregate with shaft for preheating charged materials
CA 2028108 C · Owner: Ehle, Joachim · Inventors: Fuchs, Gerhard; Ehle, Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Smelting plant with shaft-like charging material preheater. In a smelting plant with an electric arc furnace and a charging material preheater of shaft configuration arranged laterally on the furnace, the outer walls of the charging material preheater in the lower region thereof are formed by the vessel wall of the furnace while in the region thereabove they are formed by the walls of a shaft which is fixed in a holding structure. By a horizontal relative movement between the furnace vessel and the holding structure together with the vessel cover without being, impeded by the shaft, charging material can be charged from a scrap basket directly into the furnace vessel or through the …
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 February 28, 1990 and granted December 6, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 2012.
- 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.