Filter press
CA 2385275 A1 · Owner: Grafen, Karl · Inventors: Grafen, Karl; Wesp, Menrad; Spolgen, Hermann Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a filter press (1) for filtering suspensions. Said press consists of a holder (2), a support plate (3) fixed thereto a , displaceable pressure plate (5) and a packet of vertical filter plates (6) that are arranged between the support plate (3) and the pressure plate (5). Each filter chamber that is situated between two filter plates (6) is defined by at least one filter cloth (7K) which is guided in an S-shaped manner around two horizontally oriented reversing bodies (10). The reversing bodies (10) can be moved vertically and in relation to the allocated filter cloth (7) by means of two lifting elements (14) of a lifting device. Said elements are arranged on …
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 August 18, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 18, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 18, 2022.
- 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.