Method in the activation of lignocellulosic material with a gas containing nitrogen dioxide
CA 1301412 C · Owner: Samuelson, Hans Olof · Inventors: Samuelson, Hans Olof
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method in the activation of lignocellulosic material with a gas containing nitrogen dioxide, ABSTRACT The present invention relates to a method of activating aqueous lignocellulosic material with a gas containing nitrogen oxide, followed by a delignification stage for the purpose of obtaining a high quality end product with no or only a slight effect on the environment. In accordance with the inventive method, the lignocellulosic material is brought into contact with an oxygen-containing gas and, activating gas is separated from the lignocellulosic material during and/or subsequent to the activating process. The method is characterized by controlling the supply of oxygen- -containing gas …
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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 May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 2009.
- 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.