Filter and filter element
CA 2388023 A1 · Owner: Steinbrueck, Edward A. · Inventors: Steinbrueck, Edward A.; Bishop, Wayne R. W.; Gieseke, Steven S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filter arrangement includes a filter element a frame construction secured , to the filter element and a handle member secured to the filter element. In preferred embodiments, the handle member is secured to the frame construction. Preferably, the filter element includes a central core member wherein fluted , filter media is coiled around the central core member. Preferably the central , core member includes a plurality of corrugations wherein the corrugations , mateably engage at least some flutes. Preferably the handle member is , integral with the central core member and also includes a fastening member , for connection to a frame construction on the filter element. Methods for …
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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 2, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 2, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 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.