Aggregate for concrete and construction
CA 2447539 C · Owner: Newsouth Innovations Pty Limited · Inventors: Kayali, Obada; Shaw, Karl John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates generally to a method of forming a lightweight fly ash aggregate together with the resultant fly ash aggregate. The invention further relates to various aspects of the method of forming the lightweight fly ash aggregate including methods of forming fly ash slurry or dough, briquettes, or lightweight fly ash particles. The general steps involved in forming a lightweight fly ash aggregate are as follows: I. blending fly ash together with a , superplasticiser and a reduced quantity of water; II. compacting or compressing the resultant fly ash slurry or dough;, III. cutting or otherwise forming the dough or slurry into briquettes;, IV. heating the …
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 May 15, 2002 and granted November 26, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 15, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 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.