Process for producing heat-insulating material
CA 2125364 C · Owner: Rheinische Baustoffwerke Gmbh · Inventors: Engert, Hanns-Jorg; 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 producing heat-insulating material from silicate-containing material, hydrated lime, water, foam and a reactive aluminates-containing quick-setting cement from which a, pourable raw mixture is produced which is poured into moulds, the green mouldings formed in the moulds being demoulded and autoclaved after sufficient setting. To achieve very low bulk densities, it is provided that as, silicate-containing material, a quartz powder with a specific surface area according to BET of at least approx. 3 m2/g, in particular approx. 4 to 5 m2/g. is used, the raw mixture is produced with a weight ratio of water/solids (excluding foam) of at least approx. 1.25 …
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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 June 7, 1994 and granted August 20, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 7, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 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.