Filter for continuous filtration
CA 2033982 C · Owner: Strid, Kent · Inventors: Karlsson, Hans Ake; Strid, Kent; Larsson, Per
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filter for continuous, filtration of a liquid includes conventionally a vessel (1) , having a center shaft (2) on which is arranged at least one rotatable, filter element defining an inner space for liquid obtained, at filtration. Further there is provided a washing device (6), for washing of material deposited on the filter element, a connection, between said inner space and outlet means from, said vessel and a separator (10) connected to said outlet and, adapted for separating filtrate and gas. Means (19, 20) is , provided outside said vessel for generating an overpressure in, the gas space of the vessel and a lower pressure in the interior, of the filter element at least corresponding …
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 13, 1990 and granted November 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 13, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 13, 2012.
- 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.