Method for use in continuous digestion of finely divided cellulose-containing material
CA 1210907 A · Owner: Ekono Oy · Inventors: Ostman, Per H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for use in continuous digestion of finely-divided cellulose-containing material such as wood chips. According to the invention said finely-divided material is fed in a liquid-filled treatment vessel as a continuous chip pillar through a feeding zone, a heating and impregnation zone a digesting zone, and a washing zone, the temperature in the heating and impregnation zone being kept lower than in the digesting zone. In order to obtain stable temperature and chemical profiles in these zones the liquor fed in with the chips is caused to flow through the chip pillar in the feeding zone in the direction of feed of the chips with such velocity before said liquor …
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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
- Granted September 9, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 9, 2003.
- 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.