A method for recycling of old corrugated container using flotation and enzymatic hydrolysis
CA 2276242 A1 · Owner: Korea Research Institute Of Chemical Technology · Inventors: Ryu, Jeong Yong; Shin, Jong Ho; Ow, Say Kyoun
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method for recycling of old corrugated container (OCC) using flotation, followed byselective enzymatic treatment to fines portion and byselective refining to long fiber stream and more , particularly, to a method for recycling of OCC wherein OCC is treated with floatation and enzymatic hydrolysis and those recycled stock is refined thereby having the, following effects: (a) The drainage property of base paper of old corrugated container is improved; and, (b) The strength of the same is enhanced by the refining treatment of the fractionated long fiber only; and, (c) The cost for disintegration and enzymatic treatment is reduced; and (d) The imported …
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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 June 25, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2021.
- 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.