Revert briquettes for iron making blast furnace
CA 2126781 C · Owner: Cole, Richard L. · Inventors: Cole, Richard L.; Bodgan, Eugene A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An iron making blast furnace revert, briquette composition including finishing mill scale, steelmaking slag, blast furnace dust and a binder wherein the binder includes Portland cement granulated blast furnace slag cement or mixtures thereof and bentonite. The bentonite improves the cold and hot strength of the briquette.
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 June 27, 1994 and granted December 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 2016.
- 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.