Filtering apparatus
CA 2006650 C · Owner: Schlaginhaufen, Arthur · Inventors: Schlaginhaufen, Arthur
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The filtering apparatus of the invention comprises a filter housing having a water inlet and a water outlet as well as a filter bell dome connected to the housing. A main filter member and thereabove a reversing flow filter member are coaxially arranged on a filter support member located in the interior of the filter bell dome. The filter support member is spirally movable within the filter bell dome. Further revers-, ing flow filter member cleaning brushes and main filter member cleaning brushes are fixedly mounted in said filter bell dome. In the operating position the passage through the reversing, flow filter is obstructed such that the water to be filtered flows through the main filter …
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 27, 1989 and granted September 13, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 27, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 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.