Filter sector
CA 2064475 C · Owner: Kvaerner Pulp Equipment A.S. · Inventors: Strid, Kent
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filter sector for a filter disk of a rotating filter including folded or, currugated means having ridges and valleys extending in a longitudinal direction, of said means to form filtrate channels and a filtering medium covering, said means. Said means includes at least two elements (9 10), each having, parallel riges (12, 11') and valleys (11 12') and said at least two elements, are located in an at least partly overlapping relationship such that filtrate, channels (13) of one element (9) intersect with filtrate channels (14) of the other element (10). Preferably, the filter sector includes two at least substantially, equally shaped elements and said elements are disposed such that …
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 September 24, 1990 and granted January 2, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 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.