Process for the production of calcium hydrosilicate bounded shaped articles
CA 2083765 A1 · Owner: Musebrink, Olaf · Inventors: Musebrink, Olaf; Koslowski, Thomas; Hessler, Klaus-Michael
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 production of calcium hydrosilicate bounded shaped articles wherein a crude mixture, is prepared from quartz powder unslaked or slaked lime and/or Portland cement and, if appropriate, a thermally activatable setting accelerator a pore-forming agent and water and, if appropriate other additives, the, crude mixture is shaped into blanks and the blanks are autoclaved after reaching a sufficient rigidity. In order to utilise scrap materials provision is made to use as the pore-forming agent waste paper slurry consisting of short fibres or fibre constituents which has been, digested in a pulper.
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 November 25, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 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.