Steel fibre reinforced concrete with high flexural strength
CA 2094543 C · Owner: N.V. Bekaert S.A. · Inventors: Nemegeer, Dirk; Vancraeynest, Yves
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Steel fibre reinforced concrete with very high flexural strength, obtained by the fact that a concrete composition is used with a compressive strength P of at least 80 N/mm2 with, fibres made by a cold work hardening cross-section reduction operation, having a length-to-thickness ratio ranging from 60 to 120, and with a grappling form, the tensile strength T of the steel being in a proportion with respect to said compressive strength T according to the formula T/P > 17.
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 April 21, 1993 and granted November 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2015.
- 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.