Method for treating lignocellulosic materials, in particular wood and material obtained by said method
CA 2481555 C · Owner: Dupire, Maxime · Inventors: Magne, Michel; Peydecastaing, Jerome; El Kasmi, Silham
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for chemical treatment of lignocellulosic materials in particular at least a piece of timber characterized in that it consists in subjecting said materials to impregnation with a chemical agent comprising hydrocarbon chains said agent being selected among mixed anhydrides excluding acetic/benzoic acid mixed anhydride said agent being adapted to ensure covalent bonding of a plurality of hydrocarbon chains on said materials.
Read the whole patent
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 April 9, 2003 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 9, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 9, 2025.
- 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.