Filter arrangement
CA 2070783 C · Owner: Austevoll, Oystein · Inventors: Austevoll, Oystein
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filter arrangement (10) is arranged across the flow path of a liquid in a transport chute or similar guide means (12). The filter arrangement comprises a filter (16) in the flow path of the liquid. The filter (16) is adapted to be adjusted in a direction extending obliquely upwards relative to the flow path of the liquid in the transport chute or similar guide means (12). The filter has the lower roller (16d) rotatably mounted about a horizontal axis at the bottom of the transport chute or similar guide means (12) and has the upper roller (16c) together with upper parts of the filter fabric projecting upwardly above the flow path of the liquid. At the upper end of the filter a transverse …
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 5, 1990 and granted August 25, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 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.