A device in a filter sector for a rotating filter disc
CA 2265792 C · Owner: Kvaerner Pulping As · Inventors: Oswaldsson, Rolf; 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 (6) for a rotating filter disc has filtrate conduits for filtrate resulting from filtration, which is discharged at the more narrow end of the filter sector. The filtrate conduits are outwardly defined by a filtrating layer (21, 22) permeable to said filtrate. The filter sector comprises at least one element (23, 24) provided with a profiling (25 26) , forming the filtrate conduit. The profiled element itself forms the filtrating layer by means of that the profiled element has a perforation permeable to said filtrate.
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 18, 1997 and granted January 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 18, 2019.
- 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.