Setting accelerator for sprayed concrete
CA 2575146 C · Owner: Construction Research & Technology Gmbh · Inventors: Angelskar, Terje
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An accelerating admixture for concrete containing a liquid mixture being an , aqueous solution or an aqueous dispersion wherein a) the liquid mixture , contains 13 to 43 weight % dissolved aluminium sulfate b) the liquid mixture , contains less than 1 weight % dissolved carboxylic acid c) the liquid mixture , contains at least 31 weight % water d) the molar ratio of dissolved aluminium to dissolved sulfate in the liquid mixture is from 0.5 to 10Ø
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 June 16, 2005 and granted October 2, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 16, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.