Additive for dewaterable slurry
CA 2439508 A1 · Owner: James Hardie Technology Limited · Inventors: Naji, Basil; O'Chee, Milton
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An additive for a cementitious slurry comprising fly ash having a predominant particle size of up to 10 microns, and/or aluminous material having a predominant particle size of up to 150 Microns. The additive acts as a water reduction agent and can replace either wholly or partially a conventional plasticiser.
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 March 4, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 4, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 2024.
- 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.