Production of metallic lead
CA 1086255 A · Owner: Uop Inc. · Inventors: Stauter, John C.; Um, Richard T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Metallic lead is obtained from lead sulfide concentrates by halogenating the lead sulfide leaching the, resulting mixture with brine filtering to separate elemental, sulfur residue and lead halide, crystallizing the lead halide and thereafter recovering metallic lead by fused salt electrolysis.
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
- Granted September 23, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 23, 1997.
- 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.