A magnetic filter device
CA 2227650 C · Owner: Hall, Harold · Inventors: Hall, Harold
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A magnetic filter device for filtering ferromagnetic material from a fluid in which said material is suspended, has a pair of annular plates (5 6) attached , to either side of an annular magnet (2) of smaller diameter. Pairs of pole pieces (11, 12) radially disposed on the plates (5 6) are aligned so as to , generate fields of magnetic flux which promote the collection and retention of ferromagnetic material between the pairs of polepieces (11 12).
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 July 24, 1996 and granted April 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 24, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 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.