Process for producing cement from metallurgical slag
CA 2132090 C · Owner: "Holderbank" Financiere Glarus Ag · Inventors: Rey, Theo; Edlinger, Alfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of cement from metallurgical slags, in which liquid stags from reduction processes and steelworks processes, such as for example blast furnace and converter stags, are mixed together and mixed with lime. In a first cooling phase at a, temperature above 1000°C, preferably above 1200°C slag is, cooled down more slowly than in a second subsequent, cooling phase. The solidified product thus obtained is granulated and/or ground, in order to directly obtain a cement with improved hydraulic properties in particular an, increased final strength.
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 26, 1994 and granted October 3, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 26, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 26, 2016.
- 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.