Filter module and method for its manufacture
CA 2467011 C · Owner: Pall Corporation · Inventors: Zeiler, Martin; Diemer, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filter module is formed of filter material. In the filter material openings (25) are formed wherein the boundary surfaces of the openings (25) constitute the flow-through surfaces (6) . The filter module is a roll (27) of wound filter material. The openings (25) of the wound layers of the filter material form channels (26) angled relative to the winding axis (9) wherein one group , thereof opens at the outer peripheral surface (28) of the roll (27) and the other group opens at the inner peripheral surface (29) of the roll (27) and wherein the channels (26) on the other end respectively, are closed and , wherein the channels (26) angled relative to the winding axis (9) are , …
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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 November 9, 2002 and granted April 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 9, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 9, 2024.
- 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.