Polymeric ore agglomeration aids
CA 1341274 C · Owner: Gross, Anthony E. · Inventors: Gross, Anthony E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Low grade gold and silver ores are leached by spraying barren cyanide solution onto a large heap of ore. As the solution percolates through the heap, the precious metal is dissolved out of the ore. The resulting pregnant solution is then collected for further processing. A major problem is segregation of fines in building the heap and migration of fines during percolation which results in channeling and/or blinding. To overcome the problem, the heap of ore is treated with an agglomerating agent which is a water-soluble vinyl polymer having a molecular weight of at least 500,000.
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 July 10, 2001. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 10, 2018.
- 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.