Flotation machine
CA 2045448 C · Owner: Yakutsky Nauchno-Issledovatelsky I Proektny Institut Almazodobyvajuschei Promyshlennosti · Inventors: Taraban, Nikolai Timofeevich; Permyakov, Georgy Petrovich; Metsik, Viktor Mikhailovich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flotation machine comprises a cylindrical chamber having a tapered bottom to which there are secured a pipe for feeding a flotation pulp containing mineral particles of fine fraction, and a pipe for discharging gangue. Secured at the walls of the chamber is a trough for collecting froth concentrate and a group of pulp aerators, whereas arranged axially inside the chamber is a group of tapered shells spaced equidistantly heightwise of the chamber, bases of larger diameter of these shells facing the top part of the chamber and resting in one tapered surface, and one more group of tapered shells arranged at the top part of the chamber outside the shells of the first group, bases of smaller …
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 25, 1991 and granted March 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2013.
- 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.