Method for the treatment of wood with metallic treatment and wood treated by the method
CA 2311583 A1 · Owner: Aoki, Hirobumi · Inventors: Echigo, Takashi; Aoki, Hirobumi; Tanaka, Keijitsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for treating wood, characterized by impregnating wood with a metallic treatment containing both one or more lignin components selected from among lignins and derivative thereof and one or more metal components selected from among metals, metal compounds and metal ions and oxidizing and/or polymerizing the lignin components contained in the wood to thereby immobilize the metal components in the wood; and wood and woody materials treated by the method. The method not only enables the effective utilization of lignins lignosulfonic acids or lignosulfonic acid salts but also makes it possible to , reduce the exudation of the metal component from the wood to a low level to thereby …
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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 October 22, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2020.
- 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.