Calcium aluminate clinker as a refractory aggregate with and without barium addition and use thereof
CA 2536766 C · Owner: Mcgowan, Kenneth A. · Inventors: Mcgowan, Kenneth A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides for a refractory aggregate composition comprising an improved calcium aluminate clinker having the formula CnAx wherein C is calcium oxide and A is aluminum oxide wherein n is an integer , from about 1 to about 12 wherein x is an integer from about 1 to about 24 and wherein said clinker has less less than about fifty weight percent C12A7. Analogs, derivatives and hydrates of the improved calcium aluminate clinker are provided. A refractory composition and a sprayable refractory composition are disclosed comprising the improved calcium aluminate clinker.
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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 August 24, 2004 and granted February 12, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 24, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 24, 2026.
- 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.