Process for the breaking and cleaning of contaminant-containing raw paper stocks, in particular of recovered paper
CA 2365088 A1 · Owner: Schabel, Samuel · Inventors: Respondek, Peter; Schabel, Samuel; Danger, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for the disintegration and cleaning of contaminant-containing raw paper stocks. The process includes producing a contaminant-containing suspension, feeding the contaminant-containing suspension to a closed coarse screen drawing of, a cleaned flow fraction from the closed coarse screen and drawing off an , overflow, fraction containing an increased amount of contaminants from the coarse screen during at least about 80% of an operating time. The process also includes adjusting, a volumetric mass flow of the overflow fraction to at least about 15% and maximally, about 50% of a volumetric mass flow of an inflow into the coarse screen and , feeding, the overflow fraction to a …
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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 December 14, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 14, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2023.
- 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
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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.