Stabilised structure, in particular ballast type and method for stabilising such a structure
CA 2307133 A1 · Owner: Colas · Inventors: Dunand, Michel; Itty, Jacques; Le Coroller, Alain
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a structure comprising individual and separate small aggregates (2) the structure comprising a stabilising complex (3) consisting of a directly mounted coating partially covering the surface mineral elements (2) to ensure a bond between them and block them with respect to one another without affecting their draining or percolating capacity. The invention also concerns a method for obtaining such a structure.
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 October 22, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2020.
- 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.