Device for separating solids from suspension
CA 2004782 C · Owner: Hautala, Jouko · Inventors: Hautala, Jouko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Device for separating solids from suspension comprises two liquid-pervious filtering belts, such as filter wires, travelling in the same direction and being arranged to be supported each by respective liquid withdrawing surfaces. These surfaces axe provided with holes or the like and the belts being guided thereby form therebetween a prefiltering chamber converging in the direction of travel. The prefiltering chamber comprises a supply inlet for supplying suspension to be treated into the chamber as well as sealing, elements defining the chamber at its sides in directions perpendicular to the direction of travel of the belts. The sealing elements are formed by rigid walls rigidly joined to …
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 December 6, 1989 and granted April 10, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 6, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 2011.
- 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.