Reactive non-metallic product recovered from dross
CA 2098776 A1 · Owner: Lindsay, Richard D. · Inventors: Lindsay, Richard D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for treatment of salt cake or non-metallic products obtained from black dross as herein defined to remove chlorides to below about 3% under conditions whereby the aluminum nitrides within the treated material are concentrated, thereby increasing the net energy value of the treated material to provide reactive non-metallic products. The reactive non-metallic products are converted into refractory or abrasive articles using low energy input levels.
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 18, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 18, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 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.