Process for the exploitation of brown coal fly ash
CA 2123129 A1 · Owner: Koslowski, Thomas · Inventors: Koslowski, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the exploitation of brown coal ash, in particular electrostatic precipitator ash arising in the dry state to form, building materials, in which a coarse fraction having a particle size lower limit about > 500 µm is first mechanically separated off, the remaining fraction having a particle size upper limit about < 500 µm is used for the production of brickworks products as such or as the very fine fraction thereof with contents having a particle size < about 100 µm which is mechanically separated off from a fine fraction containing essentially fine quartz sand, while the fine fraction is used for the production of building materials requiring quartz …
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 2, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 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.