Pressure screen to remove impurities from a paper fiber suspension containing impurities and its use
CA 2379425 A1 · Owner: Rienecker, Reimund · Inventors: Danger, Michael; Rienecker, Reimund; Schabel, Samuel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pressure screen to remove impurities from a paper fiber suspension that contains impurities. Pressure screen includes a housing having at least one inflow, fitting, at least one accept outflow fitting and at least one reject outflow and at, least first and second cylindrical wires located within housing. The at least first, and second wires are arranged to be consecutively flowed through by paper fiber, suspension, which is introduced into housing through inflow fitting. A first accept, including a portion of paper fiber suspension that passes through first wire flows, toward second wire, and a second accept including a portion of paper fiber, suspension that passes through second wire …
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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 March 27, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 27, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 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.