Ductile embedment in brittle metal parts
CA 2239476 C · Owner: Piepho, Robert R. · Inventors: Hand, Bryan; Lacount, Dale F.; Piepho, Robert R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cast pulverizer grinding ring made of cast brittle white-cast iron has increased, resistance to failure by being provided with a mechanically intricate lightweight ductile material, system embedded in the brittle metal. The surface of the embedded material is coated prior to, casting, with a slurry of magnesium oxide particles in an alcohol vehicle together with a small amount of Bentonite particles (siliceous clay) and heat cured organic binder which resists attack by the molten metal and which avoids strong bonding with the solidified cast metal. The ductile embedment itself is a lightweight structure advantageously expanded metal. The intimate contact between the ductile embedment and …
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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 3, 1998 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 3, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 2020.
- 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.