Spiral separator
CA 1201089 A · Owner: Mineral Deposits Limited · Inventors: Giffard, Philip J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a spiral separator of the type for use in separating a pulp of water and minerals into mineral fractions of differing densities and having a helical trough supported with its axis upright. The shape of the trough working surface profile varies from place to place along the trough. The profile has a point of maximum displacement at which profile is at a maximum spacing below a notional straight line joining the inner end and outer end of the trough working surface profile. The distance of the point of maximum displacement from one end of the profile varies along the trough.
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 February 25, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2003.
- 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.