Water and fire resistent building material
CA 1279334 C · Owner: Norsk Proco A/S · Inventors: Smith-Johannsen, Robert; Berg, Johannes G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The application concerns a water and fire resistant building material consisting of a layered shaped and, hardened composition of one or more absorbant components magnesia cement, chemically active fumed silica alkali, silicate, one or several inorganic fillers one or several, lignin sulphonates, eventually ethyl silicate whereby the, final product is built up of a two binder system one, consisting of fumed silica, alkali silicate and possibly magnesium oxide and the other consisting of magnesia cement and a lignin sulphonate salt. The application also concerns the method of producing the product. The procedure is characterized by forming a dual layered binder system and by having a very …
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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
- Granted January 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 2008.
- 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.