Mortar and concrete workable in a wet spraying process, and procedure for use thereof
CA 2046500 A1 · Owner: Bracher, Gustav · Inventors: Bracher, Gustav; Burge, Theodor A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are concrete and mortar compositions for wet spraying, that have prolonged setting times (retarded long enough to be delivered from a ready mix plant to a construction site and remaining workable for up to 2 days thereafter), but which can be brought to immediate stiffening setting and quick hardening by the addition of certain setting accelerators, particularly those based on potassium aluminate.
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 July 9, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 9, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 9, 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.