A filtering method and a filter device for filtering liquids
CA 2111694 C · Owner: Handtmann, Thomas · Inventors: Handtmann, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention refers to filtering method and a filter device for filtering liquids especially beverages. The filtering method and the filter device are to be reliable and simple without any negative influence on the quality of the filtrate. A filter is produced in a precoating station by precoating with a filter aid the filters , being then removed from the precoating station together with the filter carriers and introduced into a filtering station, where they are stacked up like a tower and pressed together.
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 25, 1992 and granted November 7, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2014.
- 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.