Folding belt filter
CA 2297931 C · Owner: Day, Paul Hedley · Inventors: Day, Paul Hedley
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A belt filter for effecting separation of liquid from solids where at the , collection zone, a filter belt or belts is changed shape so as to provide a supporting shape to hold liquid, which is then fed into a nipping zone. In an embodiment there is a single belt used which is folded in a middle portion to provide the supporting shape.
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 August 6, 1998 and granted June 14, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 6, 2020.
- 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.