Mineral dewatering method
CA 1252016 A · Owner: The Dow Chemical Company · Inventors: Cawiezel, Kay E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Nonionic surfactants based upon low molecular weight block copolymers of ethylene oxide and butylene oxide are particularly useful as low foaming dewatering aids in the processing (e.g. filtering drying, etc.), of various mineral concentrates. Such surfactants are especially beneficial in that they exhibit a substantially reduced propensity to build up or accumulate in recirculating plant water. As result such surfactants, are particularly well suited for use in mineral processing facilities which are not equipped with the capability to treat recirculating plant water for the removal of excess surfactant accumulation therein.
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 April 4, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 4, 2006.
- 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.