Expired Canadian patentCanada
Material based on refractory oxides for coating a lining of a metallurgical smelting vessel
CA 2075983 C · Owner: Moertl, Guenter · Inventors: Loop, Peter; Siegl, Walter; Moertl, Guenter
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention pertains to a composition based on refractory oxides, such as sintered magnesia chrome magnesia, sintered dolomite, chromium ore and/or zirconium dioxide, for, coating a lining of a metallurgical melting vessel.
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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 January 16, 1991 and granted November 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 16, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 16, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 16, 1991
GrantedNovember 25, 1997
Term endedJanuary 16, 2011
Patent numberCA 2075983 C
Classification (IPC)C04B35/66 +2 more
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.