Process for producing a hydraulic binder (ii)
CA 2076868 A1 · Owner: Holderbank Financiere Glarus Ag · Inventors: Schwarz, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An iron complexing, pH neutral to basic compound is utilized as an activator, especially for shortening the setting times and for. increasing the early and long-term strengths, in a hydraulic binder which contains, as the additive, a soluble salt of carbonic acid. The ferrite proportion of the binder should amount to at least 4% by weight. The ironcomplexing compound is to be admixed to the binder in the dry state. A hydraulic binder according to this invention contains preferably at least 3 mmol-% of an iron-complexing compound and a carbonate donor in a molar ratio, based on the iron-complexing compound, of between 0.3 and 4.
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 December 30, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 30, 2013.
- 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.