Ceramics having high compressive strength and a process for the production of the same
CA 2099406 A1 · Owner: Kim, Jae-Chun · Inventors: Kim, Jae-Chun
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the production of ceramic materials having high compressive strength is disclosed which comprises admixing 100 weight parts of fly ash in about 15 to 40 weight parts of NaOH water solution of about 5 to 60 N concentration, molding the admixture under pressure and, immediately, sintering at a temperature without drying and curing. The process is capable of making use of fly ash pollutant, in enormous amounts, and ceramic materials produced thereby are utilized as useful materials such as construction materials, so that it is contributed to the reuse of industrial waste materials. 16
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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 30, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 30, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 2015.
- 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.