Fibre cement compositions
CA 1093729 A · Owner: Gemstat Ltd. · Inventors: Razl, Ivan; Riley, Victor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This fibre reinforced cementitious composite having improved post-cracking strength comprise an inorganic cementitious matrix having embedded therein a mixture of chopped fibres, one of the fibres being brittle highly, stiff fibre selected from glass asbestos and mineral fibres, and another of the fibres comprising a tough flexible fibre, selected from polypropylene polyethylene, polyamide, polyimide and polyester. The use of such fibre mixtures enables stronger composites to be produced containing, larger total quantities of fibres without experiencing the processing difficulties of requiring very large amounts of water for their preparation.
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
- Granted January 13, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 13, 1998.
- 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.