Fly ash composition for use in concrete mix
CA 2451657 A1 · Owner: Styron, Robert William · Inventors: Styron, Robert William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fly ash composition is provided which includes a blend of Class C fly ash potassium carbonate, and lithium carbonate which, in combination, reduce , alkali silica reactivity when the fly ash composition is used in concrete applications. The fly ash composition includes from about 65 to 99 wt.% Class C fly ash, from about 0.1 wt.% to about 4 wt% potassium carbonate and from , about 0.1 wt.% to about 4 wt.% lithium carbonate.
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 24, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 24, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 24, 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.