Concrete admixture compositions
CA 1278797 C · Owner: Construction Research & Technology Gmbh · Inventors: Brook, John W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A chloride-free cold-weather set accelerator for concrete and cement mortar comprises, A) 100 parts by weight of at least one soluble inorganic salt having freezing point depressant properties B) from 13.3 to 30 parts by weight of at least one superplasticizer, C) from 3 to 30 parts by weight of at least one inorganic early set and strength accelerator, and D) from 0 to 10 parts by weight of at least one organic set accelerator.
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 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 2008.
- 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.