Electrostatic separation of particles
CA 2107698 C · Owner: Jackson, Arnold H. · Inventors: Jackson, Arnold H.; Taylor, Joseph B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for separating one type of particle from a mixture of particle types by dropping the mixture through a free fall zone between two spaced vertical walls of electrostatically charged vertical, cylindrical, spaced, continuously rotating electrodes that are continuously brushed by a plurality of spaced vertical cylindrical continuously rotating brushes.
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 October 5, 1993 and granted July 28, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2015.
- 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.